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 A144892 #5 Jul 03 2023 10:06:08
%S A144892 1,6,36,271,2101,19296,185946,2029621,23654671,303054846,4153493496,
%T A144892 61501843771,969988075021,16326593796396,291081828746646,
%U A144892 5490558646391521,109092080140450771,2278805715594223146,49897959213869259396,1143087784199443461271
%N A144892 Row sums of triangle A144891 (S1hat(5)).
%F A144892 a(n) = Sum_{m=1..n} A144891(n,m), n>=1.
%Y A144892 Cf. A144891.
%K A144892 nonn,easy
%O A144892 0,2
%A A144892 _Wolfdieter Lang_, Oct 09 2008