# Category:Pyramidal Numbers

This category contains results about Pyramidal Numbers.
Definitions specific to this category can be found in Definitions/Pyramidal Numbers.

The pyramidal numbers are integers defined as sums of sequences of polygonal numbers as follows.

Let $P \left({k, n}\right)$ be the $n$th $k$-gonal number.

Then the $n$th $k$gonal-based pyramidal number $Y \left({k, n}\right)$ is defined as:

$\displaystyle Y \left({k, n}\right) = \sum_{i \mathop = 1}^n P \left({k, i}\right)$

## Subcategories

This category has the following 3 subcategories, out of 3 total.

## Pages in category "Pyramidal Numbers"

The following 9 pages are in this category, out of 9 total.