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 A190443 #4 Mar 30 2012 18:57:28 %S A190443 1,6,9,14,17,19,22,27,30,35,40,43,48,51,56,61,64,69,74,77,82,85,90,95, %T A190443 98,103,106,108,111,116,119,124,129,132,137,140,145,150,153,158,161, %U A190443 163,166,171,174,179,184,187,192,195,200,205,208,213,218,221,226,229,234,239,242,247,250,252,255,260,263,268,273,276,281,284,289,294,297 %N A190443 Positions of 2 in A190440. %C A190443 See A190440. %t A190443 (See A190440.) %Y A190443 Cf. A190440. %K A190443 nonn %O A190443 1,2 %A A190443 _Clark Kimberling_, May 10 2011