Period 2: repeat (2,9).

Terms

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