a(n) = n ^ (last digit of n).

Terms

a(0) =1a(1) =1a(2) =4a(3) =27a(4) =256a(5) =3125a(6) =46656a(7) =823543a(8) =16777216a(9) =387420489a(10) =1a(11) =11a(12) =144a(13) =2197a(14) =38416a(15) =759375a(16) =16777216a(17) =410338673a(18) =11019960576a(19) =322687697779a(20) =1a(21) =21a(22) =484a(23) =12167a(24) =331776a(25) =9765625a(26) =308915776a(27) =10460353203a(28) =377801998336a(30) =1