4thheptagonalnumber

<-- Enter heptagonal number statement
  

---

Calculate heptagonal number 4

The formula for heptagonal number n is as follows

Hn  =	n(5n - 3)
	2

Given n = 4, we have:

H4  =	4(5(4) - 3)
	2

H4  =	4(20 - 3)
	2

H4  =	4(17)
	2

H4  =	68
	2

H₄ = 34

---

Run Another Calculation