Expansion of Product_{k>=0} (1 + x^(3^k) + x^(2*3^k) + x^(3^(k+1)))^(3^k).

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =3a(5) =3a(6) =9a(7) =6a(8) =6a(9) =25a(10) =19a(11) =19a(12) =58a(13) =39a(14) =39a(15) =105a(16) =66a(17) =66a(18) =211a(19) =145a(20) =145a(21) =394a(22) =249a(23) =249a(24) =630a(25) =381a(26) =381a(27) =1114a(28) =733a(29) =733