8thnonagonalnumber

<-- Enter nonagonal number statement
  

---

Calculate nonagonal number 8

The formula for nonagonal number n is as follows

Nn  =	n(7n - 5)
	2

Given n = 8, we have:

N8  =	8(7(8) - 5)
	2

N8  =	8(56 - 5)
	2

N8  =	8(51)
	2

N8  =	408
	2

N₈ = 204

---

Run Another Calculation