7thnonagonalnumber

<-- Enter nonagonal number statement
  

---

Calculate nonagonal number 7

The formula for nonagonal number n is as follows

Nn  =	n(7n - 5)
	2

Given n = 7, we have:

N7  =	7(7(7) - 5)
	2

N7  =	7(49 - 5)
	2

N7  =	7(44)
	2

N7  =	308
	2

N₇ = 154

---

Run Another Calculation