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 A024475 #3 Mar 30 2012 18:55:54 %S A024475 2,5,22,31,71,94,185,225,403,466,806,924,1556,1738,2883,3220,5289, %T A024475 5815,9499,10290,16749,18188,29539,31758,51504,54798,88794,94701, %U A024475 153368,162224,262633,278691,451089,475809,770043,806725,1305486,1371279,2218964 %N A024475 s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers), t = A001950 (upper Wythoff sequence). %K A024475 nonn %O A024475 1,1 %A A024475 _Clark Kimberling_