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 A293285 #20 Oct 06 2017 21:33:21
%S A293285 1,1,0,1,-1,0,1,-1,0,0,1,-1,-2,-1,0,1,-1,-2,3,1,0,1,-1,-2,-3,-1,-1,0,
%T A293285 1,-1,-2,-3,11,-5,1,0,1,-1,-2,-3,-13,7,9,-1,0,1,-1,-2,-3,-13,55,-15,3,
%U A293285 2,0,1,-1,-2,-3,-13,-65,33,-63,-20,-2,0,1,-1,-2,-3,-13,-65
%N A293285 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of g.f. Product_{i>0} 1/(Sum_{j=0..k} j!*x^(j*i)).
%H A293285 Seiichi Manyama, <a href="/A293285/b293285.txt">Antidiagonals n = 0..139, flattened</a>
%e A293285 Square array begins:
%e A293285 1, 1, 1, 1, 1, ...
%e A293285 0, -1, -1, -1, -1, ...
%e A293285 0, 0, -2, -2, -2, ...
%e A293285 0, -1, 3, -3, -3, ...
%e A293285 0, 1, -1, 11, -13, ...
%e A293285 0, -1, -5, 7, 55, ...
%Y A293285 Columns k=0..2 give A000007, A081362, A293287.
%Y A293285 Rows n=0..1 give A000012, (-1)*A057427.
%Y A293285 Main diagonal gives A293251.
%Y A293285 Cf. A293202, A293293.
%K A293285 sign,tabl,look
%O A293285 0,13
%A A293285 _Seiichi Manyama_, Oct 04 2017