Fourth powers ending in a (different) positive fourth power.

Terms

a(0) =81a(1) =2401a(2) =6561a(3) =14641a(4) =28561a(5) =38416a(6) =50625a(7) =83521a(8) =130321a(9) =194481a(10) =234256a(11) =279841a(12) =390625a(13) =531441a(14) =707281a(15) =810000a(16) =923521a(17) =1185921a(18) =1500625a(19) =1679616a(20) =1874161a(21) =2313441a(22) =2825761a(23) =3418801a(24) =4100625a(25) =4879681a(26) =5308416a(27) =5764801a(28) =6765201a(29) =7311616