3rdnonagonalnumber

<-- Enter nonagonal number statement
  

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Calculate nonagonal number 3

The formula for nonagonal number n is as follows

Nn  =	n(7n - 5)
	2

Given n = 3, we have:

N3  =	3(7(3) - 5)
	2

N3  =	3(21 - 5)
	2

N3  =	3(16)
	2

N3  =	48
	2

N₃ = 24

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