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 A140137 #4 Mar 30 2012 18:54:36 %S A140137 1,2,4,7,8,11,13,14,16,19,22,23,25,26,28,29,31,32,35,37,38,41,43,44, %T A140137 46,47,49,50,52,53,55,56,58,59,61,62,64,67,70,71,73,74,76,77,79,82,83, %U A140137 85,86,88,89,91,92,94,95,97,98,100,101,103,104,106,107,109,110 %N A140137 Numbers n such that A140080(n) = 1. %C A140137 This and A140138 together give all numbers not divisible by 3. %Y A140137 Cf. A140080, A140138. %K A140137 nonn %O A140137 1,2 %A A140137 _Nadia Heninger_ and _N. J. A. Sloane_, Jun 08 2008