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 A134147 #7 Sep 25 2024 14:57:56
%S A134147 1,4,19,133,1123,12085,151765,2236876,37373866,702393424,14611910794,
%T A134147 333811635793,8298224157103,223061783080075,6444694333816630,
%U A134147 199168434836797921,6555131451981351961,228906927287899911709
%N A134147 Row sums of triangle A134146 and partition array A134145 (M3(3)/M3).
%F A134147 a(n) = Sum_{m=1..n} A134146(n,m), n>=1.
%F A134147 a(n) = Sum_{k=1..p(n)} A134145(n,k), with p(n) = A000041(n) (number of partitions of n).
%Y A134147 Cf. A000041, A134148 (alternating row sums of triangle A134146).
%K A134147 nonn,easy
%O A134147 1,2
%A A134147 _Wolfdieter Lang_, Nov 13 2007