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 A087160 #3 Mar 30 2012 18:36:38 %S A087160 1,2,4,7,10,14,17,20,24,27,30,35,38,41,44,48,51,54,58,61,64,69,72,75, %T A087160 78,82,85,88,92,95,98,104,107,110,113,116,120,123,126,130,133,136,140, %U A087160 143,146,151,154,157,160,164,167,170,174,177,180,185,188,191,194 %N A087160 Satisfies a(1)=1, a(2)=2, a(n+2)=a(n+1)+A087159(n)+1. %Y A087160 Cf. A087159, A087161. %K A087160 nonn %O A087160 1,2 %A A087160 _Paul D. Hanna_, Aug 22 2003