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 A363366 #5 May 29 2023 11:22:58
%S A363366 1,4,13,43,152,575,2314,9870,44535,212242,1066327,5635369,31254046,
%T A363366 181478525,1100796500,6960517564,45791562573,312867812160,
%U A363366 2216414659873,16255306015303,123249020783620,964832925700315,7788943826367902,64770559745065226,554239921143411715
%N A363366 Antidiagonal sums of A363365.
%t A363366 A363365[n_,k_]:=((k-1)*(k+1)^(n+1)+k*n-k^2+1)/k^2; Table[Sum[A363365[n-k+1,k],{k,n}],{n,27}]
%Y A363366 Cf. A363365.
%K A363366 nonn
%O A363366 1,2
%A A363366 _Stefano Spezia_, May 29 2023