2^4 = 16 16 => 1*6+1 = 7
(4^4) = 256 256 => 2*5*6+1 = (61)
(6^4) = 1296 1296 => 1*2*9*6+1 = (109)
(8^4) = 4096 4096 => 4*0*9*6+1 = (1)