Final digit of squares: a(n) = n^2 mod 10.

Terms

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