Period 2: repeat (4,8).

Terms

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