Nearest integer to 2^n*Pi/4.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =13a(5) =25a(6) =50a(7) =101a(8) =201a(9) =402a(10) =804a(11) =1608a(12) =3217a(13) =6434a(14) =12868a(15) =25736a(16) =51472a(17) =102944a(18) =205887a(19) =411775a(20) =823550a(21) =1647099a(22) =3294199a(23) =6588397a(24) =13176795a(25) =26353589a(26) =52707179a(27) =105414357a(28) =210828714a(29) =421657428