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 A024308 #6 Jan 09 2024 11:48:52 %S A024308 2,0,2,5,7,6,10,9,12,17,23,22,29,26,33,31,39,48,58,55,65,63,74,72,84, %T A024308 82,93,106,120,118,133,131,147,145,160,157,174,171,189,208,228,226, %U A024308 247,243,264,261,283,280,303,300,324,321,346,370,396,393,420,417,445,442,471,468,498 %N A024308 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k=[ (n+1)/2 ], s = (natural numbers >= 2), t = A023532. %K A024308 nonn %O A024308 1,1 %A A024308 _Clark Kimberling_