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

Terms

a(0) =1a(1) =2a(2) =15a(3) =58a(4) =235a(5) =862a(6) =3122a(7) =10664a(8) =35639a(9) =115164a(10) =363806a(11) =1122050a(12) =3393316a(13) =10068006a(14) =29374056a(15) =84347944a(16) =238713339a(17) =666419456a(18) =1836986443a(19) =5003473866a(20) =13476019215a(21) =35912177618a(22) =94746481999a(23) =247597696802a(24) =641205816641