Perfect powers whose digits are all powers of the same single-digit base.

Terms

a(0) =1a(1) =4a(2) =8a(3) =9a(4) =16a(5) =81a(6) =121a(7) =128a(8) =144a(9) =441a(10) =484a(11) =841a(12) =1331a(13) =1444a(14) =8281a(15) =11881a(16) =14884a(17) =28224a(18) =48841a(19) =114244a(20) =128881a(21) =142884a(22) =221841a(23) =228484a(24) =848241a(25) =1121481a(26) =1281424a(27) =1418481a(28) =2184484a(29) =2214144