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

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =18a(5) =40a(6) =88a(7) =184a(8) =384a(9) =783a(10) =1573a(11) =3110a(12) =6087a(13) =11745a(14) =22450a(15) =42466a(16) =79597a(17) =147890a(18) =272632a(19) =498696a(20) =905846a(21) =1634270a(22) =2929804a(23) =5220581a(24) =9249440a(25) =16297659a(26) =28567571a(27) =49825296a(28) =86487331a(29) =149438681