Period 2: repeat (3,6).

Terms

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