Please help...
What is the fórmula for this pattern?
1 1
2 3
3 7
4 13
5 21
6 33
7 47
8 63

I know that the pattern is add 2 then 4 then 6 and so on... But i cannot figuré out the formula.

Question

Please help...
What is the fórmula for this pattern?
1    1
2    3
3    7
4   13
5   21
6   33
7   47
8   63

I know that the pattern is add 2 then 4 then 6 and so on... But i cannot figuré out the formula.

anonymous · Answer

Please help

anonymous · Answer

u have found the correct pattern but its not in the way for 21 and 33

anonymous · Answer

How?
Is the 33 suposed to be a 31?

anonymous · Answer

33-21 = 12

Is it suppose to be 31? I don't know... Isn't this given information?

anonymous · Answer

Esther way i still dont get how to get the formula

anonymous · Answer

But how do I figure out the fórmula?

directrix · Answer

@MathGirlyGirl 

Would you check to determine if you posted the question correctly?

1 + 3 + 7 + 13 + 21 + 31 + 43+...