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 A132142 #4 Mar 30 2012 18:50:58 %S A132142 2,5,6,8,11,12,14,16,17,18,20,23,24,25,26,29,30,32,33,34,35,36,37,38, %T A132142 41,42,44,47,48,49,50,51,52,53,54,56,59,60,61,62,65,66,68,69,70,71,72, %U A132142 73,74,75,76,77,78,80,83,84,86,88,89,90,92,95,96,97,98,99,100,101,102,103 %N A132142 Complement of A002977. %C A132142 A132138(a(n)) = 0. %H A132142 R. Zumkeller, <a href="/A132142/b132142.txt">Table of n, a(n) for n = 1..10000</a> %K A132142 nonn %O A132142 1,1 %A A132142 _Reinhard Zumkeller_, Aug 20 2007