等于n时 2^(2n+1)-9n²+3n-2=54t
等于n+1时2^(2n+3)-9(n+1)²+3(n+1)-2=4(54t+9n²-3n+2)-9(n+1)²+3(n+1)-2
=27n(n-1)+4*54t
显然整除54