Expansion of Product_{m>=1} (1 + m*q^m)^14.

Terms

a(0) =1a(1) =14a(2) =119a(3) =798a(4) =4557a(5) =23142a(6) =107366a(7) =462856a(8) =1876952a(9) =7224714a(10) =26579063a(11) =93966992a(12) =320651170a(13) =1059923690a(14) =3404112479a(15) =10649329250a(16) =32521525967a(17) =97132069090a(18) =284187808429a(19) =815681830796