Period 2: repeat (0,4).

Terms

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