Final digit of cubes: n^3 mod 10.

Terms

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