A321377 - OEIS

%I #13 Nov 08 2018 10:14:11

%S 1,0,0,0,-1,0,-1,0,-1,-1,0,0,-1,1,1,0,1,1,1,1,2,1,3,0,2,-1,1,0,1,-1,

%T -2,-2,-3,0,-3,-4,-3,-4,-6,1,-6,-1,-4,-2,0,0,-2,2,1,1,1,6,5,6,8,7,8,8,

%U 9,9,9,8,11,0,6,6,7,3,6,-10,1,-7,-6,-7,-6,-18,-10,-21,-13,-14

%N Expansion of Product_{1 < i <= j} (1 - x^(i*j)).

%H Seiichi Manyama, <a href="/A321377/b321377.txt">Table of n, a(n) for n = 0..10000</a>

%F G.f.: Product_{k>0} (1 - x^k)^(A038548(k) - 1).

%Y Convolution inverse of A182270.

%Y Cf. A038548, A211857, A321299, A321376.

%K sign

%O 0,21

%A _Seiichi Manyama_, Nov 08 2018