Pentagonal number

Revision as of 22:31, 17 October 2024 by Blue kite (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

A pentagonal number is a number that can be expressed in the shape of a pentagon. The formula for pentagonal numbers is \[(3n^2-n)\cdot\frac{1}{2}\]