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 A281902 #10 Feb 08 2017 02:11:38 %S A281902 0,2,5,6,9,11,12,14,17,19,20,24,27,29,30,32,35,36,39,41,42,44,46,50, %T A281902 51,53,54,55,56,57,62,65,66,69,71,72,74,75,77,80,82,84,87,89,90,95,96, %U A281902 100,101,104,107,109,110,111,116,117,119,120,122,126,127,128 %N A281902 Numbers n which have the form n = k^2 - k + (i^2-i)/2 + 2*k*i, k>=1, i>=0. %C A281902 If prime p has form 8*n+1, then n is a member. %H A281902 Peter J. C. Moses, <a href="/A281902/b281902.txt">Table of n, a(n) for n = 1..5000</a> %F A281902 8k^2+8n+1 is perfect square. %Y A281902 Cf. A007519. %K A281902 nonn %O A281902 1,2 %A A281902 _Vladimir Shevelev_, Feb 01 2017 %E A281902 More terms from _Peter J. C. Moses_, Feb 01 2017