Period 2: repeat (4,6).

Terms

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