(defun f (n)
(if (>= 0 n)
1
(- n (m (f (- n 1))))))
(defun m (n)
0
(- n (f (m (- n 1))))))
(each ((n (range 0 15)))
(format t "f(~s) = ~s; m(~s) = ~s\n" n (f n) n (m n)))