Create This Matrix to N-Value

I am trying to create a matrix that looks like this without having to type out each value. How can I create a matrix like this one, but with the value of n?

The first column changes numbers every N times and the second column cycles through N values.

Answer 1

[Andrei Bobrov]

n = 3;
out = flip(fullfact([n, n]),2) - 1;

or

[x,y] = ndgrid(0:n-1);
out = [y(:),x(:)];