Final 2 digits of 7^n.

Terms

a(0) =1a(1) =7a(2) =49a(3) =43a(4) =1a(5) =7a(6) =49a(7) =43a(8) =1a(9) =7a(10) =49a(11) =43a(12) =1a(13) =7a(14) =49a(15) =43a(16) =1a(17) =7a(18) =49a(19) =43a(20) =1a(21) =7a(22) =49a(23) =43a(24) =1a(25) =7a(26) =49a(27) =43a(28) =1a(29) =7