centered nonagonal number (Q8766)

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subclass of centered polygonal number

Language	Label	Description	Also known as
English	centered nonagonal number	subclass of centered polygonal number

Statements

centered polygonal number

9

centered decagonal number

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figurate number

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defining formula

C_{9,n}={\frac {9}{2}}n(n-1)+1={{9n^{2}-9n+2} \over 2}

centered polygonal number

in defining formula

n\geq {1},n\in \mathbb {N}

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Sitelinks

⧼wikibase-sitelinks-mywikigroup⧽(0 entries)

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