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 A175966 #5 Apr 02 2014 19:21:20 %S A175966 3,5,6,8,9,10,11,13,14,15,16,17,18,20,21,22,23,24,25,26,27,28,29,31, %T A175966 32,33,34,35,36,37,38,39,40,41,42,44,45,46,47,48,49,50,51,52,53,54,55, %U A175966 56,57,58,59,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,80 %N A175966 Complement of A175965(n), where A175965(n) = the lexicographically earliest sequence with first differences as increasing sequence of noncomposites A008578. %Y A175966 Cf. A175965, A175967, A175968, A014284, A175969, A051349, A175970. %K A175966 nonn %O A175966 1,1 %A A175966 _Jaroslav Krizek_, Oct 31 2010