Diagonal length function:: A006264
diagonal sequences, sequences related to (start):
diagonal sequences: A051070 = A_n(n) respecting the offset, A091967 = A_n(n) ignoring offset, A107357 = 1 + A_n(n) respecting offset, A102288 = 1 + A_n(n) ignoring offset
diagonal sequences: incorrect versions: A031135 , A037181
diagonal sequences: see also paradoxical sequences
diagonal sequences: see also A102288 , A100543 , A039928
diagrams, circular: A007474
Diagrams:: A004300 , A000699
Diameters:: A007285
diamond lattice, sequences related to (start):
diamond lattice, theta series of: A005925 *
diamond lattice:: A005926 , A002930 , A001395 , A005925 , A003195 , A007216 , A005927 , A003212 , A003119 , A001394 , A002923 , A001397 , A001396 , A002895 , A002922 , A003208 , A003220 , A001398
difference between next prime and previous prime for terms of various sequences: see under previous prime
Difference equations:: A005921 , A005923 , A005922 , A005924
difference of two cubes , sequences related to (start):
difference of two cubes (01): A014439 A014440 A014441 A034179 A038593 A038594 A038595 A038596 A038597 A038598 A038632 A038673
difference of two cubes (02): A038808 A038847 A038848 A038849 A038850 A038851 A038852 A038853 A038854 A038855 A038856 A038857
difference of two cubes (03): A038858 A038859 A038860 A038861 A038862 A038863 A038864 A051393 A085367 A085377 A086121 A098110
difference of two cubes (04): A125063 A129965 A087786 A045980 A085479 A152043
differences = complement: A005228 *, A030124
differences of 0, sequences related to (start):
differences of 0: A000919 A000920 A001117 A001118 A002051 A002456 A019538
Differences of reciprocals of unity:: A000424 , A001240 , A001236 , A001237 , A001241 , A001238 , A001242
differences of two cubes, see difference of two cubes
differences of zero, see differences of 0
Differences periodic:: A002081
differential equations, sequences related to (start):
differential equations:: A000997 , A000995 , A000994 , A000996 , A005443 , A000998 , A005444 , A005442 , A005445
differential structures: A001676 *
digital , sequences related to digital root, sum, etc. (start):
digital root: A010888 *
digital root: see also A007612
digital sum: A007953 *
digital sum: see also sum of digits (main entry)
digits, final: see final digits
digits, last: see final digits
digits, sums of squares of: A003132
digraphs (or directed graphs), sequences related to (start):
digraphs : A000273 * (unlabeled), A053763 * (labeled)
digraphs, 2-regular, A007107 , A007108
digraphs, acyclic: A003087 (unlabeled), A003024 (labeled), A082402 (connected labeled)
digraphs, acyclic: by number of out-points: A003025 , A003026
digraphs, connected: A003085 *
digraphs, Eulerian, A007080 , A007105
digraphs, mating, A006023 , A006025
digraphs, regular, A005641 , A005642
digraphs, see also A003028 , A003084
digraphs, self-complementary, A003086
digraphs, self-converse, A002499
digraphs, semi-regular, A003286 , A005535
digraphs, strongly connected, A003030 (labeled), A035512 (unlabeled); see also A054946 (tournaments)
digraphs, subgraphs of, A005014 , A005016 , A005327 , A005328 , A005329 , A005330 , A005331 , A005332
digraphs, switching classes of: A006536 *
digraphs, transitive: A000798 * (labeled), A001930 * (unlabeled)
digraphs, triangle of numbers of: (1) A052296 A054733 A057270 A057271 A057272 A057273 A057274 A057275 A057276 A057277 A057278 A057279
digraphs, triangle of numbers of: (2) A058876
digraphs, unilateral, A003029 , A003088
digraphs, weakly connected, A003027
digraphs, weakly distance-regular: A057560
digraphs, with same converse as complement, A003069
Dimensions:: A007478 , A007473 , A007182 , A006973 , A007293 , A003038 , A001776
Diophantine equations: see also Pellian equation
Diophantine equations:: A006452 , A006451 , A006454
Dirac delta function: A000007 *
directed graphs, see digraphs
Diregular:: A005642 , A005641
Dirichlet divisor problem: A006218
Dirichlet series: sequences related to (start):
Dirichlet series: PARI examples: (01) A031358 A145390
Dirichlet series: PARI examples: (02) A000005 A000082 A000086 A000203 A000377 A001157 A001227 A001615 A002131 A002654 A003958 A003959
Dirichlet series: PARI examples: (03) A007425 A007427 A007429 A007430 A007431 A008683 A003421 A003420 A003419 A002558 A003521
discordant, sequences related to (start):
discordant:: A002634 , A000183 , A002633 , A000270 , A000380 , A000388 , A000561 , A000440 , A000562 , A000470 , A000563 , A000476 , A000492 , A000564 , A000500 , A000565
discriminants , sequences related to (start):
discriminants of imaginary quadratic fields with class number (negated): (1) 1: A014602 , 2: A014603 , 3: A006203 , 4: A013658 , 5: A046002 , 6: A046003 , 7: A046004 , 8: A046005 , 9: A046006 , 10: A046007 , 11: A046008 , 12: A046009 , 13: A046010 ,
discriminants of imaginary quadratic fields with class number (negated): (2) 14: A046011 , 15: A046012 , 16: A046013 , 17: A046014 , 18: A046015 , 19: A046016 , 21: A046018 , 23: A046020 , 24: A048925 , 25: A056987 ,
discriminants of imaginary quadratic fields, see also quadratic fields, imaginary
discriminants of real quadratic fields by class nunber: A050950 -A050969 , A051962 -A051965
discriminants of real quadratic fields, see also quadratic fields, real
Discriminants:: A006555 , A006554
Discriminants:: of fields, A003171 , A003657 , A003644 , A003658 , A003656 , A003246 , A003653 , A006832 , A002769
Discriminants:: of polynomials, A004124 , A007701 , A001782 , A006312
Discriminants:: of quadratic forms, A003655
Disjunctive:: A003039 , A005616 , A005739
Disk:: A005497 , A002710 , A002712 , A004305 , A001683 , A002713 , A005495 , A002711 , A002709 , A005499 , A005498
dismal arithmetic , sequences related to (start):
dismal arithmetic : A087061 (addition), A087062 (multiplication, Maple code)
dismal arithmetic, base 2: A067398 (squares), A078645 (primes), A048888
dismal arithmetic, perfect numbers: see comment in A087416
dismal arithmetic, primes: A087097 *, A087636 , A087638 , A084666
dismal arithmetic: A087019 (squares), A087052 (triangulars), A087036 (cubes), A087051 (4th powers), A087028 and A087029 (divisors), A087079 (partitions), A087121 , A087416 , A087082 and A087083 (sum of divisors)
dismal arithmetic: see also A087027 A088923 A088924 A087984 A011539
dismal arithmetic: see also A088469 -A088481
dissections, sequences related to (start):
dissections, of a polygon (1):: A001004 , A003455 , A000063 , A005036 , A003456 , A000131 , A003450 , A003454 , A003452 , A000150 , A005034 , A003447 , A005040 , A003445
dissections, of a polygon (2):: A003442 , A005038 , A000207 , A003453 , A003449 , A003441 , A001002 , A003448 , A005419 , A003443 , A003451 , A003444 , A005035 , A002293
dissections, of a polygon (3):: A005039 , A005033 , A005037 , A002295 , A002296 , A002055 , A002056 , A007160
dissections, of rectangles: A049021 *
dissections, of regular polygons to regular polygons: A110000 , A110312 , A110316
dissections: A000207 *
Dissections:: of a ball, A001763 , A001762
Dissections:: of a disk, A001761
distinct prime factors, sequences related to (start):
distinct prime factors: at least 1: A000027 2: A024619 3: A000977
distinct prime factors: at most 1: A000961 2: A070915
distinct prime factors: exactly 1: A000961 2: A007774 3: A033992 4: A033993 5: A051270 6: A074969
distinct prime factors: number of A001221
distinct prime factors: see also prime factors
distinct prime factors: table of: A125666
Distribution problem:: A002018
divergent series: A002387 , A092324 , A092267 , A092753
divisibility sequences , sequences related to (start):
divisibility sequences ( 1): A000522 A001339 A002248 A002452 A003757 A005013 A005120 A005178 A006238 A006720 A006769 A007434
divisibility sequences ( 2): A039834 A051138 A058939 A059928 A060478 A082030 A086892 A087612 A087612 A095000 A095177 A105309
divisibility sequences ( 3): A115000 A116201 A127595 A133394 A138573 A141827 A141828 A143699 A152090 A140824
divisibility sequences, 3rd order: A003690 , Number of spanning trees in K_3 X P_n
divisibility sequences, 3rd order: A004146 , Alternate Lucas numbers - 2
divisibility sequences, 3rd order: A005386 , Area of n-th triple of squares around a triangle
divisibility sequences, 3rd order: A006253 , Number of perfect matchings (or domino tilings) in C_4 X P_n
divisibility sequences, 3rd order: A007654 , Numbers n such that standard deviation of 1,...,n is an integer
divisibility sequences, 4th order: A001350 , Associated Mersenne numbers
divisibility sequences, 4th order: A002248 , Number of points on y^2+xyA003773 , Number of spanning trees in K_4 X P_n
divisibility sequences, 4th order: A006238 , Complexity of (or spanning trees in) a 3 X n grid
divisibility sequences, 6th order: A001351 , Associated Mersenne numbers
divisibility sequences, 6th order: A001945 , a(n+6) A003755 , Number of spanning trees in S_4 X P_n
divisibility sequences, 6th order: A005120 , a(n+6) A006235 , Complexity of doubled cycle
divisibility sequences, 8th order: A005822 , Number of spanning trees in third power of cycle
divisibility sequences, 8th order: A028468 , Number of perfect matchings in graph P_{6} X P_{n}
divisibility sequences: A001542 = 2 * (A001109 )
divisibility sequences: A003645 (n)=2^n*Cat(n+1)=A000079 (n)*A000108 (n+1)
divisibility sequences: A003690 = 3 * (A004254 )^2
divisibility sequences: A003696 = (A001353 ) * (A161158 )
divisibility sequences: A003733 = 5 * (A143699 )^2
divisibility sequences: A003739 = 5 * (A001906 )^2 * (A161159 )
divisibility sequences: A003745 = 3 * 5^2 * (A004254 ) * (A004187 )^3
divisibility sequences: A003751 = 5^3 * (A004187 )^4
divisibility sequences: A003753 = 2^2 * (A001109 ) * (A001353 )^2 = 2 * (A001542 ) * (A001353 )^2
divisibility sequences: A003755 = (A001109 ) * (A001906 )^2
divisibility sequences: A003761 = (A001906 ) * (A004254 ) * (A001109 )
divisibility sequences: A003767 = 2^3 * (A001353 ) * (A001109 )^2
divisibility sequences: A003773 = 2 * (A001542 )^3 = 2^4 * (A001109 )^3
divisibility sequences: A005159 (n)=3^n*Cat(n), that is, A005159 =A000244 *A000108 .
divisibility sequences: A005319 = 4*A001109
divisibility sequences: A092136 = (A004187 ) * (A001906 )^3
divisibility sequences: A106328 = 3*A001109
divisibility sequences: A139400 = (A001906 ) * (A001353 ) * (A004254 ) * (A161498 )
divisible by each digit: A002796 *, A034838 *, A034709
divisible by product of digits: A007602 *
divisor chains: A067957 *, A093313 , A093314 , A093315 , A094097 , A094098 , A094099
divisors, sequences related to (start):
divisors, anti: A066272
divisors, average of, A003601 , A006218
divisors, inverse to d(n), A005179
divisors, isolated: A133779 (triangle), A132881 (number)
divisors, isolated: see also A133950 , A134320
divisors, largest prime power: A053585
divisors, largest prime: A006530 *
divisors, largest: A032742 *
divisors, list of: A027750
divisors, middle: A067742 *, A071090
divisors, nontrivial: A070824 (divisors of n in the range 1 < d < n), A137510
divisors, number of (d(n)): A000005 *
divisors, number of (d(n)): see also (1): A002324 , A002175 , A002183 , A002131 , A005179 (inverse function to d(n)), A002132 , A002133 , A002134 , A003680 , A005237 , A002130 , A002191 , A002127 , A002128
divisors, number of (d(n)): see also (2): A002129 , A002173 , A000441 , A002961 , A000477 , A000499
divisors, numbers having 11-20: A030629 , A030630 , A030631 , A030632 , A030633 , A030634 , A030635 , A030636 , A030637 , A030638
divisors, numbers having 2-10: A000040 , A001248 , A030513 , A030514 , A030515 , A030516 , A030626 , A030627 , A030628
divisors, numbers having 21-30: A137484 , A137485 , A137486 , A137487 , A137488 , A137489 , A137490 , A137491 , A137492 , A137493
divisors, of divisors: A141586
divisors, of x^n-1: A107748 , A114536 , A117215 , A117342 , A117343
divisors, proper: A032741 * (divisors of n which are < n), A001065 (sum of), A027751 (list of)
divisors, proper: see also divisors, nontrivial
divisors, proper: see divisors, proper
divisors, proper: the term is sometimes incorrectly used to refer to divisors of n in the range 1 < d < n (see A070824 )
divisors, smallest prime power: A028233 , A053597
divisors, smallest: A020639 *
divisors, sum of odd: A000593 *
divisors, sum of: A000203 *, A001065 * (proper), A048050 * (proper)
divisors, summing over, in Maple: A000031 *