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 A190675 #4 Mar 30 2012 18:57:28 %S A190675 1,4,5,8,12,15,16,19,20,23,27,30,31,34,38,42,45,46,49,53,56,57,60,61, %T A190675 64,68,71,72,75,76,79,83,86,87,90,94,98,101,102,105,109,112,113,116, %U A190675 117,120,124,127,128,131,135,139,142,143,146,150,154,157,158,161,165,168,169,172,173,176,180,183,184,187,191,195,198,199,202,206 %N A190675 Positions of 2 in A190672. %C A190675 See A190672. %t A190675 (See A190672.) %Y A190675 Cf. A190672. %K A190675 nonn %O A190675 1,2 %A A190675 _Clark Kimberling_, May 16 2011