a(n) = B(n) + c(n) where B(n) is Beatty sequence [ n*e ] and c is the complement of B.

Terms

a(0) =3a(1) =8a(2) =12a(3) =16a(4) =20a(5) =25a(6) =30a(7) =33a(8) =38a(9) =42a(10) =46a(11) =50a(12) =55a(13) =60a(14) =63a(15) =68a(16) =72a(17) =76a(18) =81a(19) =85a(20) =90a(21) =93a(22) =98a(23) =102a(24) =106a(25) =111a(26) =115a(27) =120a(28) =123a(29) =128