a(n) = n^n mod 10^n.

Terms

a(0) =1a(1) =4a(2) =27a(3) =256a(4) =3125a(5) =46656a(6) =823543a(7) =16777216a(8) =387420489a(9) =0a(10) =85311670611a(11) =916100448256a(19) =0