We need to determine the pattern
1,5,9,13
How do we get from 1 to 5
We add 4
How do we get from 5 to 9
Add 4
How do we get from 9 to 13
We are adding 4
13 + 4 = 17
17+4 = 21
21+4 = 25
The next 3 items in the sequence is
17,21,25
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