Pick values from one column and organize in another

[jediguran]

Hello

I have been struggling with this issue for some time and I think it is fairly easy to solve, but I have been unable to find the solution. I have a column of numbers and I want to copy numbers, with a constant periodicity, and paste in a new column. In the example below, I copy values from column A and past in column B, picking only every third value:

A B
1 1
2 4
3 7
4 10
5
6
7
8
9
10

Is there a smart way to do this? Thanks in advance!