a(n) = B(n) + C(n) where B(n) is Beatty sequence [ n*sqrt(3) ] and C is complement of B.

Terms

a(0) =3a(1) =7a(2) =12a(3) =15a(4) =19a(5) =24a(6) =28a(7) =31a(8) =36a(9) =40a(10) =45a(11) =48a(12) =52a(13) =57a(14) =60a(15) =64a(16) =69a(17) =73a(18) =76a(19) =81a(20) =85a(21) =90a(22) =93a(23) =97a(24) =102a(25) =106a(26) =109a(27) =114a(28) =118a(29) =121