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

Terms

a(0) =1a(1) =0a(2) =2a(3) =6a(4) =15a(5) =32a(6) =79a(7) =172a(8) =397a(9) =860a(10) =1879a(11) =3986a(12) =8462a(13) =17586a(14) =36408a(15) =74366a(16) =150875a(17) =303006a(18) =604511a(19) =1195872a(20) =2350614a(21) =4587484a(22) =8898857a(23) =17154278a(24) =32883109a(25) =62679852a(26) =118858190a(27) =224238730a(28) =421021209a(29) =786793776