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 A190447 #4 Mar 30 2012 18:57:28 %S A190447 2,7,10,15,18,23,28,31,36,39,41,44,49,52,57,62,65,70,73,78,83,86,91, %T A190447 96,99,104,107,112,117,120,125,128,130,133,138,141,146,151,154,159, %U A190447 162,167,172,175,180,183,185,188,193,196,201,206,209,214,217,222,227,230,235,240,243,248,251,256,261,264,269,272,274,277,282,285 %N A190447 Positions of 1 in A190445. %C A190447 See A190445. %t A190447 (See A190445.) %Y A190447 Cf. A190445. %K A190447 nonn %O A190447 1,1 %A A190447 _Clark Kimberling_, May 10 2011