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 A211210 #12 May 10 2021 14:44:03
%S A211210 1,1,3,16,115,1021,10696,128472,1734447,25937683,424852351,7554471156,
%T A211210 144767131444,2971727661124,65013102375404,1509186299410896,
%U A211210 37032678328740751,957376811266995031,25999194631060525009,739741591417352081464,22000132609456951524051
%N A211210 a(n) = Sum_{k=0..n} binomial(n, k)*|S1(n, k)|.
%C A211210 Binomial convolution of the unsigned Stirling numbers of the first kind.
%C A211210 Row sums of triangle A187555.
%t A211210 Table[Sum[Binomial[n, k] Abs[StirlingS1[n, k]], {k, 0, n}], {n, 0, 20}]
%o A211210 (PARI) a(n) = sum(k=0, n, binomial(n, k)*abs(stirling(n, k, 1))); \\ _Michel Marcus_, May 10 2021
%Y A211210 Cf. A317274 (signed S1), A187555, A134090, A211211.
%Y A211210 Cf. A122455 (second kind), A271702, A134094, A343841 (second kind inverse).
%K A211210 nonn
%O A211210 0,3
%A A211210 _Olivier Gérard_, Oct 23 2012