通用公式:A(x)=1+x-3*x ^2+13*x ^3-65*x ^4+351*x ^5-1989*x ^6+11650*x ^7-69900*x ^8+427167*x ^9-2648438*x ^10+。..
这样A(x)^7=A(x^7)+7*x,如图所示:
A(x)^7=1+7*x+x ^7-3*x ^14+13*x ^21-65*x ^28+351*x ^35-1989*x ^42+11650*x ^49-69900*x ^56+427167*x ^63-2648438*x ^70+。..