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 A024688 #3 Mar 30 2012 18:55:59 %S A024688 0,1,4,3,5,4,8,14,22,21,28,27,36,34,45,43,56,54,68,83,98,97,114,112, %T A024688 132,130,151,149,171,170,193,191,217,215,242,238,265,262,290,321,352, %U A024688 351,384,382,418,416,452,451,489,488,528,526,568,566,610,607,649,647,691,687,735 %N A024688 s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A000201 (lower Wythoff sequence), t = A014306. %K A024688 nonn %O A024688 1,3 %A A024688 _Clark Kimberling_