\(M(n,m \#) = \underbrace{M(M(M(...,m-1\#),m-1\#),m-1\#)}_{n~M ext s}\) (\(m>1\)) \(M(n,1) = n^n\) (only 2 entries and \(m=1\)), or n in a triangle = triangle(n). \(M(\#\ 0) = M(\#)\) (last entry is 0) \(M(n,0,0,...,0,0,m) = M(\underbrace{n,n...n,n}_{n+1},m-1)\) (otherwise)