Expansion of Product_{k>=1} 1/(1 - x^k)^(k^2*(k+1)^2/4).

Terms

a(0) =1a(1) =1a(2) =10a(3) =46a(4) =191a(5) =740a(6) =2912a(7) =10941a(8) =40345a(9) =144703a(10) =509693a(11) =1761738a(12) =5993434a(13) =20076668a(14) =66329914a(15) =216307961a(16) =696990583a(17) =2220665661a(18) =7000973556a(19) =21853019072a(20) =67575353580a(21) =207111103623a(22) =629440843762