a(n) = floor(27/n).

Terms

a(0) =27a(1) =13a(2) =9a(3) =6a(4) =5a(5) =4a(6) =3a(7) =3a(8) =3a(9) =2a(10) =2a(11) =2a(12) =2a(13) =1a(14) =1a(15) =1a(16) =1a(17) =1a(18) =1a(19) =1a(20) =1a(21) =1a(22) =1a(23) =1a(24) =1a(25) =1a(26) =1a(27) =0a(28) =0a(29) =0