A Beatty sequence: floor(n*(sqrt(3) + 2)).

Terms

a(0) =3a(1) =7a(2) =11a(3) =14a(4) =18a(5) =22a(6) =26a(7) =29a(8) =33a(9) =37a(10) =41a(11) =44a(12) =48a(13) =52a(14) =55a(15) =59a(16) =63a(17) =67a(18) =70a(19) =74a(20) =78a(21) =82a(22) =85a(23) =89a(24) =93a(25) =97a(26) =100a(27) =104a(28) =108a(29) =111