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

Terms

a(0) =0a(1) =3a(2) =6a(3) =9a(4) =12a(5) =15a(6) =18a(7) =21a(8) =25a(9) =28a(10) =31a(11) =34a(12) =37a(13) =40a(14) =43a(15) =47a(16) =50a(17) =53a(18) =56a(19) =59a(20) =62a(21) =65a(22) =69a(23) =72a(24) =75a(25) =78a(26) =81a(27) =84a(28) =87a(29) =91