We are given the rule
n*2 + 1
And it's required to form a pattern out of it. We can assume n is the number of the term of the pattern, starting with n = 1 and increasing it by 1.
For n = 1:
1*2 + 1 = 2 + 1 = 3
For n = 2:
2*2 + 1 = 4 + 1 = 5
For n = 3:
3*2 + 1 = 6 + 1 = 7
For n = 4:
4*2 + 1 = 8 + 1 = 9
So, the pattern can be written as:
3, 5, 7, 9, ...
To add more terms to the pattern, just use the next value of n.