Expansion of Product_{k>=0} (1 + x^(3^k))^(3^(k+1)).

Terms

a(0) =1a(1) =3a(2) =3a(3) =10a(4) =27a(5) =27a(6) =45a(7) =108a(8) =108a(9) =147a(10) =333a(11) =333a(12) =480a(13) =1107a(14) =1107a(15) =1467a(16) =3294a(17) =3294a(18) =3801a(19) =8109a(20) =8109a(21) =9300a(22) =19791a(23) =19791a(24) =22644a(25) =48141a(26) =48141a(27) =50806a(28) =104277a(29) =104277