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 A213713 #6 Oct 26 2012 23:03:52 %S A213713 2,5,6,9,10,12,13,14,17,18,20,21,22,24,25,27,28,29,30,33,34,36,37,38, %T A213713 40,41,43,44,45,47,48,50,51,52,54,55,56,58,59,60,61,62,65,66,68,69,70, %U A213713 72,73,75,76,77,79,80,82,83,84,86,87,88,90,91,92,93,95,96,98,99,100,102,103,105,106,107,108,110,111,113,114,115,117,118,119,121,122,123,124,125,126,129 %N A213713 Complement of A179016. %H A213713 Antti Karttunen, <a href="/A213713/b213713.txt">Table of n, a(n) for n = 1..15000</a> %o A213713 (MIT/GNU Scheme with AK's intseq-library): (define A213713 (COMPLEMENT 1 A179016)) %Y A213713 Union of A055938 & A213717. %K A213713 nonn %O A213713 1,1 %A A213713 _Antti Karttunen_, Oct 26 2012