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 A024882 #3 Mar 30 2012 18:56:00 %S A024882 0,0,4,7,11,18,29,47,94,152,246,398,644,1042,1686,2728,4537,7341, %T A024882 11878,19219,31097,50316,81413,131729,213142,344871,559377,905091, %U A024882 1464468,2369559,3834027,6203586 %N A024882 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023531, t = (Lucas numbers). %K A024882 nonn %O A024882 2,3 %A A024882 _Clark Kimberling_