Calculate octagonal number 9
Octagonal Numbers form dots in the shape of an octagon.
Octagonal Number Image:
Octagonal Number Formula:
On = n(3n - 2)
Given n = 9, we have:
O9 = 9(3(9) - 2)
O9 = 9(27 - 2)
O9 = 9(25)
O9 = 225
Octagonal Number List 1 - 9
| n | Octagonal number On |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 21 |
| 4 | 40 |
| 5 | 65 |
| 6 | 96 |
| 7 | 133 |
| 8 | 176 |
| 9 | 225 |
What is the Answer?
O9 = 225
How does the Octagonal Number Calculator work?
Free Octagonal Number Calculator - This calculator determines the nth octagonal number
This calculator has 1 input.
This calculator has 1 input.
What 1 formula is used for the Octagonal Number Calculator?
On = n(3n - 2)
What 4 concepts are covered in the Octagonal Number Calculator?
- number
- an arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations and for showing order in a series or for identification. A quantity or amount.
- octagon
- An eight (8) sided polygon
P = 8s - octagonal number
- property
- an attribute, quality, or characteristic of something
