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 A293255 #11 Oct 05 2017 09:49:02
%S A293255 1,-1,1,-6,0,3,4,-3,-8,22,12,6,3,-22,-62,61,-2,68,-166,68,-14,-216,
%T A293255 -53,196,-12,304,-15,-32,-322,24,274,-112,-294,832,638,-213,918,-474,
%U A293255 -570,-854,-1227,-1018,3476,-2038,588,-1382,3520,-578,-248,-1314,-292,-8825
%N A293255 G.f.: Product_{m>0} (1 - x^m + 2!*x^(2*m) - 3!*x^(3*m)).
%H A293255 Seiichi Manyama, <a href="/A293255/b293255.txt">Table of n, a(n) for n = 0..500</a>
%p A293255 b:= proc(n, i) option remember; `if`(n=0, 1, `if`(i<1, 0,
%p A293255 add(b(n-i*j, i-1)*j!*(-1)^j, j=0..min(3, n/i))))
%p A293255 end:
%p A293255 a:= n-> b(n$2):
%p A293255 seq(a(n), n=0..60); # _Alois P. Heinz_, Oct 04 2017
%Y A293255 Column k=3 of A293071.
%Y A293255 Cf. A289485.
%K A293255 sign
%O A293255 0,4
%A A293255 _Seiichi Manyama_, Oct 04 2017