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 A112706 #7 Jan 30 2024 16:13:23
%S A112706 1,2,4,9,26,103,542,3529,26901,232416,2233500,23576045,270690473,
%T A112706 3353312672,44520193362,629960268107,9456454463204,149995788999117,
%U A112706 2505304374275816,43928236200319751,806397434192280456
%N A112706 Row sums of triangle A112705.
%F A112706 a(n) = Sum_{m=0..n} A112705(n, m).
%Y A112706 Cf. A112705.
%K A112706 nonn,easy
%O A112706 0,2
%A A112706 _Wolfdieter Lang_, Oct 31 2005