Number of cubic residues mod 2^n.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =10a(5) =19a(6) =37a(7) =74a(8) =147a(9) =293a(10) =586a(11) =1171a(12) =2341a(13) =4682a(14) =9363a(15) =18725a(16) =37450a(17) =74899a(18) =149797a(19) =299594a(20) =599187a(21) =1198373a(22) =2396746a(23) =4793491a(24) =9586981a(25) =19173962a(26) =38347923a(27) =76695845a(28) =153391690a(29) =306783379