F mertens(count)
   ‘Generate Mertens numbers’
   V m = [-1, 1]
   L(n) 2 .. count
      m.append(1)
      L(k) 2 .. n
         m[n] -= m[n I/ k]
   R m

V ms = mertens(1000)

print(‘The first 99 Mertens numbers are:’)
print(‘  ’, end' ‘ ’)
V col = 1
L(n) ms[1.<100]
   print(‘#2’.format(n), end' ‘ ’)
   col++
   I col == 10
      print()
      col = 0

V zeroes = sum(ms.map(x -> Int(x == 0)))
V crosses = sum(zip(ms, ms[1..]).map((a, b) -> Int(a != 0 & b == 0)))
print(‘M(N) equals zero #. times.’.format(zeroes))
print(‘M(N) crosses zero #. times.’.format(crosses))