Expansion of Product_{k>=1} 1/(1 - x^k)^((3*k-1)*binomial(k+2,3)/2).

Terms

a(0) =1a(1) =1a(2) =11a(3) =51a(4) =216a(5) =861a(6) =3477a(7) =13367a(8) =50377a(9) =184667a(10) =664484a(11) =2345230a(12) =8142476a(13) =27825576a(14) =93750686a(15) =311682789a(16) =1023547782a(17) =3322634928a(18) =10669887669a(19) =33916213669a(20) =106776876109a(21) =333111724130