a(n) = 2^n mod 19.

Terms

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