给定g.f.A(x),以下总和都相等:
(1) B(x)=和{n>=0}x^n*A(x)^(3*n)/(1-x*A(x)^n),
(2) B(x)=和{n>=0}x^n*A(x)^(2*n)/(1-x*A(x^(3*n+1)),
(3) B(x)=和{n>=0}x^n*A(x)^n/(1-x*A(x)^(3*n+2)),
(4) B(x)=和{n>=0}x^n/(1-x*A(x)^(n+3)),
(5) B(x)=和{n>=0}x^(2*n)*A(x)^(n^2+3*n)*(1-x^2*A(x)^,
(6) B(x)=Sum_{n>=0}x^(2*n)*A(x)^(3*n^2+3*n)*(1-x^2*A(x)^(6*n+3))/((1-x*A(x)^(3*n+1))*(1-x*A(x)^(3*n+2)));
有关B(x)的值,请参见示例部分。