a(n) = 3^n mod 100.

Terms

a(0) =1a(1) =3a(2) =9a(3) =27a(4) =81a(5) =43a(6) =29a(7) =87a(8) =61a(9) =83a(10) =49a(11) =47a(12) =41a(13) =23a(14) =69a(15) =7a(16) =21a(17) =63a(18) =89a(19) =67a(20) =1a(21) =3a(22) =9a(23) =27a(24) =81a(25) =43a(26) =29a(27) =87a(28) =61a(29) =83