Period 2: repeat (1,10).

Terms

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