a(n) = floor(2^n*Pi).

Terms

a(0) =1a(1) =3a(2) =6a(3) =12a(4) =25a(5) =50a(6) =100a(7) =201a(8) =402a(9) =804a(10) =1608a(11) =3216a(12) =6433a(13) =12867a(14) =25735a(15) =51471a(16) =102943a(17) =205887a(18) =411774a(19) =823549a(20) =1647099a(21) =3294198a(22) =6588397a(23) =13176794a(24) =26353589a(25) =52707178a(26) =105414357a(27) =210828714a(28) =421657428a(29) =843314856