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 A137624 #2 Mar 30 2012 18:50:59 %S A137624 1,3,5,6,7,9,10,12,13,14,15,16,17,19,20,21,23,24,25,26,27,28,30,31,32, %T A137624 34,35,36,37,38,39,41,42,43,44,45,46,47,48,49,50,52,53,55,56,57,58,59, %U A137624 60,61,62,63,65,66,67,68,69,70,71,73,74,75,77,78,79,80,81,82,83,85,86 %N A137624 Complement of A120632. %C A137624 A137621(a(n)) = A018252(n). %K A137624 nonn %O A137624 1,2 %A A137624 _Reinhard Zumkeller_, Jan 30 2008