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

Terms

a(0) =1a(1) =2a(2) =4a(3) =14a(4) =24a(5) =58a(6) =124a(7) =238a(8) =480a(9) =922a(10) =1764a(11) =3238a(12) =6008a(13) =10794a(14) =19292a(15) =34166a(16) =59504a(17) =103042a(18) =176452a(19) =299958a(20) =505240a(21) =845570a(22) =1403324a(23) =2315118a(24) =3794640a(25) =6180370a(26) =10009540a(27) =16121374a(28) =25829512a(29) =41171690