![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/1/13/Centered_heptagonal_number.svg/640px-Centered_heptagonal_number.svg.png&w=640&q=50)
Centered heptagonal number
Centered figurate number that represents a heptagon with a dot in the center / From Wikipedia, the free encyclopedia
A centered heptagonal number is a centered figurate number that represents a heptagon with a dot in the center and all other dots surrounding the center dot in successive heptagonal layers. The centered heptagonal number for n is given by the formula
.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/1/13/Centered_heptagonal_number.svg/640px-Centered_heptagonal_number.svg.png)
The first few centered heptagonal numbers are
1, 8, 22, 43, 71, 106, 148, 197, 253, 316, 386, 463, 547, 638, 736, 841, 953[1]