Expansion of Product_{i>=1, j>=1} (1 + x^(i*j) + x^(2*i*j)).

Terms

a(0) =1a(1) =1a(2) =3a(3) =4a(4) =10a(5) =14a(6) =27a(7) =39a(8) =71a(9) =101a(10) =170a(11) =242a(12) =390a(13) =551a(14) =852a(15) =1198a(16) =1803a(17) =2512a(18) =3687a(19) =5101a(20) =7351a(21) =10088a(22) =14289a(23) =19472a(24) =27208a(25) =36810a(26) =50790a(27) =68262a(28) =93200a(29) =124453