b.m

在matlab环境下

function y=B(m)
%m=5;
N=zeros(m,m+1);
N(1,1)=1;
for i=2:m
    for k=1:i-1
        N(i,k+1)=(k/(i-1))*N(i-1,k+1)+((i-k)/(i-1))*N(i-1,k);
    end
end
y=N(m,:);