Lower of a pair of adjacent perfect powers, both with exponents > 2.

Terms

a(0) =27a(1) =64a(2) =125a(3) =243a(4) =1000a(5) =1296a(6) =2187a(7) =50625a(8) =59049a(9) =194481a(10) =279841a(11) =456533a(12) =614125a(13) =3111696a(14) =6434856a(15) =22665187a(16) =25411681a(17) =38950081a(18) =62742241a(19) =96059601a(20) =131079601a(21) =418161601a(22) =506250000a(23) =741200625a(24) =796594176a(25) =1249198336a(26) =2136719872a(27) =2217342464a(28) =5554571841a(29) =5802782976