a(n) = [x^n] x * Product_{j>=0} (1 + x^(2^j) + n*x^(2^(j+1))).

Terms

a(0) =0a(1) =1a(2) =1a(3) =4a(4) =1a(5) =11a(6) =7a(7) =57a(8) =1a(9) =28a(10) =21a(11) =265a(12) =13a(13) =365a(14) =211a(15) =3616a(16) =1a(17) =69a(18) =55a(19) =1141a(20) =41a(21) =1828a(22) =1013a(23) =25439a(24) =25a(25) =1951a(26) =1405a(27) =41608a(28) =813a(29) =50519