a(n) = 2^n mod 53.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =32a(6) =11a(7) =22a(8) =44a(9) =35a(10) =17a(11) =34a(12) =15a(13) =30a(14) =7a(15) =14a(16) =28a(17) =3a(18) =6a(19) =12a(20) =24a(21) =48a(22) =43a(23) =33a(24) =13a(25) =26a(26) =52a(27) =51a(28) =49a(29) =45