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 A186296 #7 Mar 31 2012 10:25:40 %S A186296 2,6,10,22,30,34,42,54,66,70,82,90,106,114,126,142,154,166,174,190, %T A186296 210,222,234,246,250,262,274,282,286,294,310,322,330,342,346,370,394, %U A186296 406,414,430,442,454,474,486,510,526,546,562,582,586,594 %N A186296 ( A007520(n)+1 )/2. %F A186296 a(n) = A186297(n)+1. %K A186296 nonn %O A186296 1,1 %A A186296 _Marco Matosic_, Feb 17 2011