%I #16 Jun 25 2018 12:47:13
%S 1,4,5,5,-6,-12,-4,34,56,1,-158,-267,56,874,1234,-691,-4966,-5796,
%T 6132,28411,26932,-46687,-162814,-117746,332350,929348,454328,
%U -2278344,-5259270,-1250947,15199212,29375294,-1279006,-99217863,-161079712,60427836,635914664
%N Inverse Weigh transform of n^2.
%H N. J. A. Sloane, <a href="/transforms.txt">Transforms</a>
%F Product_{k>=1} (1+x^k)^a(k) = 1 + Sum_{k>=1} A000290(k)*x^k.
%e (1+x)*(1+x^2)^4*(1+x^3)^5*(1+x^4)^5*(1+x^5)^(-6)* ... = 1 + x + 4*x^2 + 9*x^3 + 16*x^4 + 25*x^5 + ... .
%Y Cf. A000290, A253909, A306152, A316152.
%K sign
%O 1,2
%A _Seiichi Manyama_, Jun 25 2018