bn:03802894n
Noun Concept
Categories: Figurate numbers, Number stubs
EN
nonagonal number  enneagonal number
EN
A nonagonal number is a figurate number that extends the concept of triangular and square numbers to the nonagon. Wikipedia
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EN
A nonagonal number is a figurate number that extends the concept of triangular and square numbers to the nonagon. Wikipedia
Polygonal number Wikidata
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