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

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =0a(5) =3a(6) =0a(7) =6a(8) =3a(9) =10a(10) =9a(11) =15a(12) =28a(13) =24a(14) =60a(15) =47a(16) =126a(17) =99a(18) =227a(19) =225a(20) =414a(21) =498a(22) =717a(23) =1044a(24) =1301a(25) =2082a(26) =2364a(27) =3984a(28) =4482a(29) =7353