Hello if anyone can help me with this I will be so glad. I've spent two hours straight working on it and I can't figure it out. It's due tomorrow and I am stressing!

Okay so I need an algebraic equation for this chart.

Term Number Term Value

1 ---------------- 6

2 --------------- 12

3 --------------- 20

4 --------------- 30

5--------------- 42

6 ---------------56

7----------------72

Thanks so much