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 A293140 #10 Feb 23 2022 13:10:25
%S A293140 1,-1,-2,0,0,120,0,5040,0,0,0,0,-479001600,0,0,-1307674368000,0,0,0,0,
%T A293140 0,0,1124000727777607680000,0,0,0,403291461126605635584000000,0,0,0,0,
%U A293140 0,0,0,0,-10333147966386144929666651337523200000000,0,0,0,0
%N A293140 E.g.f.: Product_{m>0} (1-x^m).
%F A293140 a(n) = n! * A010815(n).
%F A293140 a(n) = Sum_{k=0..A003056(n)} (-1)^k * A351884(n,k). - _Alois P. Heinz_, Feb 23 2022
%Y A293140 Column k=1 of A293139.
%Y A293140 Cf. A003056, A010815, A088311, A351884.
%K A293140 sign
%O A293140 0,3
%A A293140 _Seiichi Manyama_, Oct 01 2017