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 A124868 #10 Jun 09 2014 12:23:56
%S A124868 1,2,3,4,5,6,7,8,9,11,13,17
%N A124868 Natural numbers that are not the sum of 3 distinct primes.
%C A124868 (Conjectured) Every number n > 17 is the sum of 3 distinct primes. a(n) is the complement of A124867(n) = {10, 12, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, ...}, numbers that are the sum of 3 distinct primes.
%C A124868 A125688(a(n)) = 0. - _Reinhard Zumkeller_, Nov 30 2006
%Y A124868 Cf. A124867 (numbers that are the sum of 3 distinct primes), A068307.
%K A124868 fini,full,nonn
%O A124868 1,2
%A A124868 _Alexander Adamchuk_, Nov 11 2006