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 A190777 #4 Mar 30 2012 18:57:29 %S A190777 2,6,9,12,16,19,23,26,29,30,33,36,40,43,46,47,50,53,57,60,64,67,70,71, %T A190777 74,77,81,84,87,88,91,94,98,101,105,108,111,112,115,118,122,125,128, %U A190777 129,132,135,139,142,146,149,152,156,159,163,166,169,170,173,176,180,183,186,187,190,193,197,200,204,207,210,211,214,217,221,224 %N A190777 Positions of 1 in A190775. %C A190777 See A190775. %t A190777 (See A190775.) %Y A190777 Cf. A190775. %K A190777 nonn %O A190777 1,1 %A A190777 _Clark Kimberling_, May 19 2011