Expansion of Product_{k>=1} (1+x^k)^(k*(k-1)*(k-2)/6).

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =4a(5) =10a(6) =20a(7) =39a(8) =72a(9) =144a(10) =280a(11) =567a(12) =1112a(13) =2187a(14) =4204a(15) =8073a(16) =15309a(17) =28986a(18) =54548a(19) =102286a(20) =190881a(21) =354717a(22) =656194a(23) =1208712a(24) =2217624a(25) =4052633a(26) =7379630a(27) =13390098a(28) =24215587a(29) =43649482