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 A096604 #3 Mar 30 2012 18:50:44 %S A096604 3,6,7,10,12,14,15,18,20,22,24,26,28,30,31,34,36,38,40,42,44,46,48,50, %T A096604 52,54,56,58,60,62,63,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96, %U A096604 98,100,102,104,106,108,110,112,114,116,118,120,122,124,126,127,130 %N A096604 Numbers that appear at most once in A096607. %C A096604 a(n) occurs at most twice in A096605; %C A096604 complement of A096603, a and A096603 are disjoint; %C A096604 A096602(a(n)) = A096603(n). %K A096604 nonn %O A096604 1,1 %A A096604 _Reinhard Zumkeller_, Jun 30 2004