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 A158787 #2 Mar 30 2012 17:26:29 %S A158787 1,2,14,10,27,3,68,4,21,16,5,44,23,22,48,38,6,17,42,170,7,24,63,193, %T A158787 13,8,40,87,25,26,19,75,53,9,41,15,61,39,47,62,20,45,11,60,33,28,118, %U A158787 114,29,66,167,120,12,86,137,92,175,64,78,77,84,58,59,148,90,267,37,50,82 %N A158787 a(n) = position of n in A076991. %C A158787 A076991 is conjectured to be a permutation of the positive integers. %Y A158787 Cf. A076991 a(1) = 1, a(2) = 2, a(n) = smallest positive integer not occurring earlier such that the sum of three successive terms is a square. %K A158787 nonn %O A158787 1,2 %A A158787 _Zak Seidov_, Mar 26 2009