Expansion of Product_{m>=1} (1+x^m)^15.

Terms

a(0) =1a(1) =15a(2) =120a(3) =695a(4) =3285a(5) =13443a(6) =49305a(7) =165795a(8) =519240a(9) =1531960a(10) =4295046a(11) =11520000a(12) =29718605a(13) =74060355a(14) =178930605a(15) =420368858a(16) =962785560a(17) =2154411120a(18) =4718952965a(19) =10134292275a(20) =21369644184a(21) =44300604895a(22) =90390209685a(23) =181706747280a(24) =360207189225a(25) =704726281002