[81, 512, 2401, 4913, 5832, 17576, 19683, 234256, 390625, 614656, 1679616, 
    17210368, 34012224, 52521875, 60466176, 205962976, 612220032, 
    8303765625, 10460353203, 24794911296, 27512614111, 52523350144, 
    68719476736, 271818611107, 1174711139837, 2207984167552, 6722988818432,
    20047612231936, 72301961339136, 248155780267521]
Certain Power of Sum of Digits of N == N (running too slowly)