Perfect powers beginning and ending with the same digit.

Terms

a(0) =1a(1) =4a(2) =8a(3) =9a(4) =121a(5) =343a(6) =484a(7) =676a(8) =1331a(9) =1521a(10) =1681a(11) =4624a(12) =5625a(13) =9409a(14) =10201a(15) =11881a(16) =12321a(17) =14161a(18) =14641a(19) =16641a(20) =17161a(21) =19321a(22) =19881a(23) =21952a(24) =40804a(25) =43264a(26) =44944a(27) =47524a(28) =49284a(29) =50625