Search: id:A100039
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%I A100039
%S A100039 22,35,52,73,98,127,160,197,238,283,332,385,442,503,568,637,710,787,868,
%T A100039 953,1042,1135,1232,1333,1438,1547,1660,1777,1898,2023,2152,2285,2422,
%U A100039 2563,2708,2857,3010,3167,3328,3493,3662,3835,4012,4193,4378,4567,4760
%N A100039 Positions of occurrences of the natural numbers as fourth subsequence 
               in A100035.
%C A100039 n>1: A100035(a(n))=n and A100035(m)<>n for a(n-1)<=m<a(n);
%C A100039 A100036(n) < A100037(n) < A100038(n) < a(n).
%F A100039 2n^2 + 7n + 13 (conjectured). - Ralf Stephan, May 15 2007
%e A100039 First terms (10=A,11=B,12=C) of A100035(a(n)):
%e A100039 .....................1............2................3....
%e A100039 1231435425165764736271879869584938291A9BA8B7A6B5A4B3A2B1;
%e A100039 a(1) = A084849(4) = 22, A100035(22) = 1;
%e A100039 a(2) = A014107(4) = 35, A100035(35) = 2;
%e A100039 a(3) = A033537(5) = 52, A100035(52) = 3;
%e A100039 a(4) = A100040(6) = 73, A100035(73) = 4;
%e A100039 a(5) = A100041(7) = 98, A100035(98) = 5.
%Y A100039 Sequence in context: A125526 A124317 A159518 this_sequence A061561 A167277 
               A084141
%Y A100039 Adjacent sequences: A100036 A100037 A100038 this_sequence A100040 A100041 
               A100042
%K A100039 nonn
%O A100039 1,1
%A A100039 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 31 2004

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