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

Terms

a(0) =1a(1) =1a(2) =3a(3) =9a(4) =28a(5) =75a(6) =198a(7) =494a(8) =1243a(9) =3061a(10) =7500a(11) =18055a(12) =43057a(13) =101292a(14) =236178a(15) =545218a(16) =1248480a(17) =2835059a(18) =6390360a(19) =14298631a(20) =31778782a(21) =70168935a(22) =153993321a(23) =335977369a(24) =728962258a(25) =1573189113a(26) =3377881482a(27) =7217395643a(28) =15348900996a(29) =32494548816