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 A108289 #7 Sep 02 2024 21:52:34
%S A108289 1,2,5,17,72,357,2022,12900,91448,711180,6004981,54619489,531854438,
%T A108289 5515551251,60642234815,704106298738,8603658260904,110306422692488,
%U A108289 1479905106340895,20727595895871297,302423908621734606
%N A108289 Antidiagonal sums of table A060543.
%F A108289 a(n)=Sum_{k=0..n} C(n+(n-k)*k, (n-k)*k+k).
%o A108289 (PARI) a(n)=sum(k=0,n,binomial(n+(n-k)*k,(n-k)*k+k))
%Y A108289 Cf. A108267, A060543, A108288.
%K A108289 nonn
%O A108289 0,2
%A A108289 _Paul D. Hanna_, May 31 2005