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... > mathematical analysis > calculus > sequence > integer sequence > figurate number > centered polygonal numbers > centered decagonal number
number > natural numbers > figurate number > centered polygonal numbers > centered decagonal number

Preferred term

centered decagonal number  

Definition

  • A centered decagonal number is a centered figurate number that represents a decagon with a dot in the center and all other dots surrounding the center dot in successive decagonal layers. The centered decagonal number for n is given by the formula
    Thus, the first few centered decagonal numbers are
    1, 11, 31, 61, 101, 151, 211, 281, 361, 451, 551, 661, 781, 911, 1051, ... (sequence A062786 in the OEIS)

    (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Centered_decagonal_number)

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URI

http://data.loterre.fr/ark:/67375/PSR-KLQPNN0B-R

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