Exponentially evil squares.

Terms

a(0) =1a(1) =64a(2) =729a(3) =1024a(4) =4096a(5) =15625a(6) =46656a(7) =59049a(8) =117649a(9) =262144a(10) =531441a(11) =746496a(12) =1000000a(13) =1048576a(14) =1771561a(15) =2985984a(16) =3779136a(17) =4826809a(18) =7529536a(19) =9765625a(20) =11390625a(21) =16000000a(22) =16777216a(23) =24137569a(24) =34012224a(25) =47045881a(26) =60466176a(27) =64000000a(28) =85766121a(29) =113379904