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

Terms

a(0) =1a(1) =1a(2) =7a(3) =22a(4) =71a(5) =206a(6) =616a(7) =1712a(8) =4743a(9) =12677a(10) =33407a(11) =86085a(12) =218677a(13) =546060a(14) =1345840a(15) =3271893a(16) =7861239a(17) =18670881a(18) =43883904a(19) =102112483a(20) =235401947a(21) =537869136a(22) =1218743007a(23) =2739566083a(24) =6111766043a(25) =13536683750a(26) =29775945929a(27) =65065819486a(28) =141285315728a(29) =304935221675