def nmultiplos(i, j, n):
"""
>>> nmultiplos(1, 5, 10)
1 2 3 4 5 6 7 8 9 10
2 4 6 8 10 12 14 16 18 20
3 6 9 12 15 18 21 24 27 30
4 8 12 16 20 24 28 32 36 40
5 10 15 20 25 30 35 40 45 50
>>> nmultiplos(20, 30, 5)
20 40 60 80 100
21 42 63 84 105
22 44 66 88 110
23 46 69 92 115
24 48 72 96 120
25 50 75 100 125
26 52 78 104 130
27 54 81 108 135
28 56 84 112 140
29 58 87 116 145
30 60 90 120 150
"""
for num in range(i, j + 1):
linia = str(num)
for x in range(num * 2, num * n + 1, num):
linia = linia + ' ' + str(x)
print(linia)
if __name__ == '__main__':
import doctest
print(doctest.testmod())