252^5=3*3*3*2*2*7*3*3*3*2*2*7*3*3*3*2*2*7*3*3*3*2*2*7*3*3*3*2*2*7
=6*6*6*6*6*6*6*6*6*6*21*21*21*21*21
6^n
当n=1,2,3,4,5,6,7,8,9,10
都成立
252^5=3*3*3*2*2*7*3*3*3*2*2*7*3*3*3*2*2*7*3*3*3*2*2*7*3*3*3*2*2*7
=6*6*6*6*6*6*6*6*6*6*21*21*21*21*21
6^n
当n=1,2,3,4,5,6,7,8,9,10
都成立