|
Search: id:A163395
|
|
|
| A163395 |
|
a(n)=(nth even nonprime)^(nth even number). |
|
+0
1
|
|
| 1, 16, 1296, 262144, 100000000, 61917364224, 56693912375296, 72057594037927936, 121439531096594251776, 262144000000000000000000, 705429498686404044207947776, 2315513501476187716057433112576
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
Here nth even number = A005843(n), nth even nonprime = A163300(n) (A014076 U A163300 = A141468).
|
|
FORMULA
|
a(n)=A163300^A005843(n).
|
|
EXAMPLE
|
a(1)=0^0=1, a(2)=4^2=16, a(3)=6^2=1296.
|
|
MAPLE
|
A163300 := proc(n) if n = 1 then 0; else for a from procname(n-1)+2 by 2 do if not isprime(a) then return a; end if; end do; end if; end proc: A005843 := proc(n) 2*n ; end: A163395 := proc(n) A163300(n)^A005843(n-1) ; end: seq(A163395(n), n=1..13) ; [From R. J. Mathar (mathar(AT)str.w.leidenuniv.nl), Oct 14 2009]
|
|
CROSSREFS
|
Cf. A005843, A014076, A141468, A163300.
Sequence in context: A163929 A072914 A007480 this_sequence A134375 A057994 A160251
Adjacent sequences: A163392 A163393 A163394 this_sequence A163396 A163397 A163398
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jul 26 2009
|
|
EXTENSIONS
|
Extended by R. J. Mathar (mathar(AT)str.w.leidenuniv.nl), Oct 14 2009
|
|
|
Search completed in 0.002 seconds
|
