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 A024518 #6 Jul 13 2019 18:53:42 %S A024518 1,2,4,6,10,14,18,23,29,36,43,49,59,67,76,86,97,108,119,132,143,157, %T A024518 169,182,198,215,230,245,263,280,297,316,334,354,375,394,415,436,457, %U A024518 480,503,527,549,574,598,624,650,674,703,730,758,787,815,844,871,902,934,965,994 %N A024518 a(n) = position of 1 + n^2 in A000404 (sums of 2 nonzero squares). %K A024518 nonn %O A024518 1,2 %A A024518 _Clark Kimberling_ %E A024518 More terms from _Sean A. Irvine_, Jul 13 2019