In mathematics, the centered polygonal numbers are a class of figurate numbers, each formed by a central dot surrounded by polygonal layers of dots with a constant number of sides. Each side of a polygonal layer contains one more dot than the corresponding side of the previous layer, so from the second layer onward, each layer of a centered k-gonal number adds k more dots than the layer before it. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
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Source Wolfram MathWorld: Centered Polygonal Number
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1. Centered Polygonal Number (Wikipedia)
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In mathematics, the centered polygonal numbers are a class of series of figurate numbers, each formed by a central dot, surrounded by polygonal layers of dots with a constant number of sides.
Wolfram MathWorld: Centered Polygonal Number
Wolfram MathWorldIn Branch: Number Theory, Subject classificationsQuote, In Branch: Number Theory, Subject classifications
Number Theory Special Numbers
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