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 A175970 #2 Mar 30 2012 19:00:24 %S A175970 2,3,4,6,7,8,9,10,12,13,14,15,16,17,18,20,21,22,23,24,25,26,27,29,30, %T A175970 31,32,33,34,35,36,37,39,40,41,42,43,44,45,46,47,48,49,51,52,53,54,55, %U A175970 56,57,58,59,60,61,62,63,65,66,67,68,69,70 %N A175970 Complement of A051349(n), where A051349(n) = the lexicographically earliest sequence with first differences as increasing sequence of composites A002808(n). %Y A175970 Cf. A175965, A175966, A175967, A175968, A175969, A014284, A051349. %K A175970 nonn %O A175970 1,1 %A A175970 _Jaroslav Krizek_, Oct 31 2010