The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #5 Feb 01 2018 20:56:46
%S 1,-1,-4,9,48,100,-756,-3479,-1600,24462,225900,364573,-643536,
%T -9251736,-36989316,-32397975,165039872,1725828525,5338814652,
%U 8082713829,-26321848400,-233434232766,-811526778964,-1731126953532,1151302859712,23632432765000,113461901639788,287935019845749
%N a(n) = [x^n] Product_{k>=1} (1 - n*x^k)^k.
%t Table[SeriesCoefficient[Product[(1 - n x^k)^k, {k, 1, n}], {x, 0, n}], {n, 0, 27}]
%Y Cf. A073592, A266964, A292132, A297324, A298985, A298987, A298988.
%K sign
%O 0,3
%A _Ilya Gutkovskiy_, Jan 31 2018