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 A124257 #3 Mar 30 2012 16:50:35 %S A124257 6,9,10,11,12,14,17,18,19,20,22,23,25,26,27,28,30,33,35,36,37,38,39, %T A124257 40,41,42,43,45,46,47,48,49,50,51,52,53,54,57,58,59,60,62,65,66,67,68, %U A124257 69,70,71,72,73,74,75,76,77,78,79,80,82,83,84,85,86,87,88,90,91,92,93,94,95,96 %N A124257 Complement of A124168. %K A124257 nonn %O A124257 1,1 %A A124257 _N. J. A. Sloane_, following a suggestion of Jonathan Vos Post, Dec 15 2006