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 A132807 #2 Mar 30 2012 17:25:24 %S A132807 1,2,5,12,29,73,195,556,1685,5373 %N A132807 A000108(n) + A000079(n) - 1. %F A132807 a(n) = C(n) + 2^n - 1. %e A132807 a(3) = 12 = C(3) + 2^3 - 1 = 5 + 8 = 1. %Y A132807 Cf. A000108, A000079. %K A132807 nonn %O A132807 0,2 %A A132807 _Gary W. Adamson_, Aug 31 2007