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 A190769 #4 Mar 30 2012 18:57:29 %S A190769 1,4,7,11,14,18,21,24,25,28,31,35,38,41,42,45,48,52,55,59,62,65,66,69, %T A190769 72,76,79,82,83,86,89,93,96,100,103,106,110,113,117,120,123,124,127, %U A190769 130,134,137,140,141,144,147,151,154,158,161,164,165,168,171,175,178,181,182,185,188,192,195,199,202,205,209,212,216,219,222 %N A190769 Positions of 2 in A190766. %C A190769 See A190766. %t A190769 (See A190766.) %Y A190769 Cf. A190766. %K A190769 nonn %O A190769 1,2 %A A190769 _Clark Kimberling_, May 19 2011