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 A294583 #17 Nov 05 2017 04:56:56 %S A294583 1,1,-1,1,-1,-1,1,-1,-4,0,1,-1,-16,-5,0,1,-1,-64,-65,-3,1,1,-1,-256, %T A294583 -665,-79,23,0,1,-1,-1024,-6305,-1575,831,44,1,1,-1,-4096,-58025, %U A294583 -28255,33335,4789,104,0,1,-1,-16384,-527345,-481623,1323807,411664,15099,70,0 %N A294583 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of Product_{j>=1} (1 - j^k*x^j)^(j^k). %H A294583 Seiichi Manyama, <a href="/A294583/b294583.txt">Antidiagonals n = 0..113, flattened</a> %F A294583 A(0,k) = 1 and A(n,k) = -(1/n) * Sum_{j=1..n} (Sum_{d|j} d^(k+1+k*j/d)) * A(n-j,k) for n > 0. %e A294583 Square array begins: %e A294583 1, 1, 1, 1, 1, ... %e A294583 -1, -1, -1, -1, -1, ... %e A294583 -1, -4, -16, -64, -256, ... %e A294583 0, -5, -65, -665, -6305, ... %e A294583 0, -3, -79, -1575, -28255, ... %Y A294583 Columns k=0..2 give A010815, A266964, A294584. %Y A294583 Rows n=0..1 give A000012, (-1)*A000012. %Y A294583 Cf. A294585. %K A294583 sign,tabl %O A294583 0,9 %A A294583 _Seiichi Manyama_, Nov 03 2017