Respuestas

2013-02-18T05:10:23+01:00

3,6,9,12,15,18,21,24,27,30,33,3,39  etc

 

2013-02-18T05:15:35+01:00

3 x

1, 2, 3,  4,     5,  6,   7,   8,    9,  10   11  12  13  14  15

=

3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45