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

Terms

a(0) =1a(1) =12a(2) =90a(3) =508a(4) =2391a(5) =9840a(6) =36578a(7) =125358a(8) =402093a(9) =1220232a(10) =3532836a(11) =9821280a(12) =26352110a(13) =68528718a(14) =173311971a(15) =427486178a(16) =1030855416a(17) =2435255634a(18) =5645810201a(19) =12864839166a(20) =28850671284a(21) =63751119334a(22) =138946592610a(23) =298974483954a(24) =635626314025