Multiples of 9: a(n) = 9*n.

Terms

a(0) =0a(1) =9a(2) =18a(3) =27a(4) =36a(5) =45a(6) =54a(7) =63a(8) =72a(9) =81a(10) =90a(11) =99a(12) =108a(13) =117a(14) =126a(15) =135a(16) =144a(17) =153a(18) =162a(19) =171a(20) =180a(21) =189a(22) =198a(23) =207a(24) =216a(25) =225a(26) =234a(27) =243a(28) =252a(29) =261