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 A380116 #5 Feb 02 2025 10:08:51
%S A380116 0,2,13,72,393,2202,12850,78488,502327,3366648,23597297,172691956,
%T A380116 1317276400,10455135350,86200363093,737106122656,6527505175609,
%U A380116 59780020466870,565446090755746,5517274559079820,55470610206913511,574043981110581992,6108574536700411929,66779470651426032840
%N A380116 a(n) = Sum_{k=0..n} A011971(n, k)*k. The Aitken-Bell triangle considered as a linear transform applied to the nonnegative numbers.
%p A380116 BellTriangle := A011971: seq(add(BellTriangle(n, k)*k, k=0..n), n=0..23);
%Y A380116 Cf. A011971, A278677.
%K A380116 nonn
%O A380116 0,2
%A A380116 _Peter Luschny_, Feb 01 2025