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 A192563 #13 May 26 2021 02:23:49
%S A192563 1,2,13,161,3148,87784,3274640,156359874,9252910816,662065322016,
%T A192563 56172251821992,5562573507747288,634574662217269824,
%U A192563 82482896750780978880,12101565966159294983808,1987899464090970683668944,363036441677797499946379776
%N A192563 a(n) = Sum_{k=0..n} abs(Stirling1(n+1,k+1))*Stirling2(n+1,k+1)*k!.
%H A192563 Stefano Spezia, <a href="/A192563/b192563.txt">Table of n, a(n) for n = 0..270</a>
%t A192563 Table[Sum[Abs[StirlingS1[n+1,k+1]]StirlingS2[n+1,k+1]k!,{k,0,n}],{n,0,100}]
%o A192563 (Maxima) makelist(sum(abs(stirling1(n+1,k+1))*stirling2(n+1,k+1)*k!,k,0,n),n,0,12);
%Y A192563 Diagonal of the array A344639.
%Y A192563 Cf. A000142, A008275, A008277, A081048.
%K A192563 nonn
%O A192563 0,2
%A A192563 _Emanuele Munarini_, Jul 04 2011