>>602
n=1
(1/6)(1*1+2*1+3*1+4*1+5*1+6*1)=21/6=7/2
6- (5^1+4^1+3^1+2^1+1)/6 = 6 - 15/6 =(36-15)/6=21/6 =7/2

n=2
6- (5^2+4^2+3^2+2^2+1)/6^2 = 6 - (25+16+9+4+1)/6^2 = 6- 55/6^2= (216-55)/36= 161/36

どこが破綻？