Star number

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

In mathematics, a star number is a centered figurate number, a centered hexagram (six-pointed star), such as the Star of David, or the board Chinese checkers is played on. The numbers are also called centered dodecagonal numbers because star numbers are centered polygonal numbers with a twelve-sided shape.

Excerpt from the Wikipedia article “Star number”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Turbojet, CC BY-SA 4.0, via Wikimedia Commons.