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#centered_hexagonal_number

Centered hexagonal number

Number that represents a hexagon with a dot in the center

In mathematics and combinatorics, a centered hexagonal number, or hex number, is a centered figurate number that represents a hexagon with a dot in the center and all other dots surrounding the center dot in a hexagonal lattice. The following figures illustrate this arrangement for the first four centered hexagonal numbers:

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Centered hexagonal number Hexagonal number 91 (number) Pentagonal number Hexagonal lattice 300 (number) Star number 37 (number) 700 (number) 900 (number)
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