Final digit of 8^n.

Terms

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