ackermann = function(m, n)
    if m == 0 then return n+1
    if n == 0 then return ackermann(m - 1, 1)
    return ackermann(m - 1, ackermann(m, n - 1))
end function

for m in range(0, 3)
    for n in range(0, 4)
        print "(" + m + ", " + n + "): " + ackermann(m, n)
    end for
end for