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 A025119 #3 Mar 30 2012 18:56:01 %S A025119 5,7,31,43,94,115,212,245,403,462,679,759,1065,1180,1568,1710,2212, %T A025119 2386,3016,3242,3987,4250,5152,5455,6529,6901,8122,8544,9962,10461, %U A025119 12051,12604,14420,15035,17088,17798,20054,20831,23355,24233,26984,27937,30978,32011 %N A025119 s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A000201 (lower Wythoff sequence), t = A001950 (upper Wythoff sequence). %K A025119 nonn %O A025119 1,1 %A A025119 _Clark Kimberling_