Period 2: repeat (1,7).

Terms

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