This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A292939 #13 Oct 07 2017 21:55:09 %S A292939 1,3,5,7,11,13,15,19,27,29,31,37,53,59,61,63,67,83,95,101,107,127,131, %T A292939 139,149,163,173,179,181,197,211,227,255,269,277,293,305,317,347,349, %U A292939 373,379,389,419,421,443,461,467,491,509,511,519,523,541,547,557,563,587,613,619,653,659,661,677,701,709,757,773 %N A292939 Odd numbers k such that A292270((k-1)/2) is a square. %H A292939 Antti Karttunen, <a href="/A292939/b292939.txt">Table of n, a(n) for n = 1..1001</a> %F A292939 a(n) = 1 + 2*A292938(n). %Y A292939 Union of A000225 and A292940. %Y A292939 Cf. A001122, A292379 (subsequences). %Y A292939 Cf. also A292270, A292938. %K A292939 nonn %O A292939 1,2 %A A292939 _Antti Karttunen_ and _Vladimir Shevelev_, Oct 06 2017