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 A156245 #4 Sep 14 2012 11:06:39 %S A156245 2,8,13,18,26,31,38,44,51,56,62,67,74,80,85,92,97,103,110,115,121,126, %T A156245 133,138,144,150,157,162,167,175,180,188,193,201,206,212,217,224,229, %U A156245 234,242,247,253,258,265,271,278,283,291,296,303,308,314,319,324,332 %N A156245 Bisection of A078649. %F A156245 a(n) = A078649(2n-1). %K A156245 nonn %O A156245 1,1 %A A156245 _Benoit Cloitre_, Feb 07 2009