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 A025108 #3 Mar 30 2012 18:56:01 %S A025108 5,7,24,33,71,87,166,192,342,393,674,754,1264,1413,2337,2570,4216, %T A025108 4568,7455,8097,13171,14162,22991,24462,39664,42304,68539,72498, %U A025108 117400,124580,201677,212730,344314,360717,583768,613190,992284,1036483,1677193,1757493,2843818 %N A025108 s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (F(2), F(3), F(4), ...), t = A001950 (upper Wythoff sequence). %K A025108 nonn %O A025108 1,1 %A A025108 _Clark Kimberling_