Expansion of Product_{k>=1} 1/(1 - k*x^k)^(k^2).

Terms

a(0) =1a(1) =1a(2) =9a(3) =36a(4) =140a(5) =481a(6) =1774a(7) =5925a(8) =20076a(9) =64980a(10) =208486a(11) =652058a(12) =2017023a(13) =6117878a(14) =18347256a(15) =54222195a(16) =158463794a(17) =457570786a(18) =1307951914a(19) =3700153918a(20) =10371860026a(21) =28810051738a(22) =79359812567a(23) =216834266612a(24) =587961817595