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  2. Category:Figurate numbers - Wikipedia

    en.wikipedia.org/wiki/Category:Figurate_numbers

    Download as PDF; Printable version; In other projects ... This category includes not only articles about certain types of figurate numbers, ... Centered cube number;

  3. Figurate number - Wikipedia

    en.wikipedia.org/wiki/Figurate_number

    a number represented as a discrete r-dimensional regular geometric pattern of r-dimensional balls such as a polygonal number (for r = 2) or a polyhedral number (for r = 3). a member of the subset of the sets above containing only triangular numbers, pyramidal numbers , and their analogs in other dimensions.

  4. Figurate numbers - Wikipedia

    en.wikipedia.org/?title=Figurate_numbers&redirect=no

    Print/export Download as PDF; Printable version; From Wikipedia, the free encyclopedia. Redirect page. Redirect to: Figurate number ...

  5. List of integer sequences - Wikipedia

    en.wikipedia.org/wiki/List_of_integer_sequences

    A Harshad number in base 10 is an integer that is divisible by the sum of its digits (when written in base 10). A005349: Factorions: 1, 2, 145, 40585, ... A natural number that equals the sum of the factorials of its decimal digits. A014080: Circular primes: 2, 3, 5, 7, 11, 13, 17, 37, 79, 113, ...

  6. Decagonal number - Wikipedia

    en.wikipedia.org/wiki/Decagonal_number

    Download as PDF; Printable version; ... In mathematics, a decagonal number is a figurate number that extends the ... the patterns involved in the construction of ...

  7. Polygonal number - Wikipedia

    en.wikipedia.org/wiki/Polygonal_number

    In mathematics, a polygonal number is a number that counts dots arranged in the shape of a regular polygon [1]: 2-3 . These are one type of 2-dimensional figurate numbers . Polygonal numbers were first studied during the 6th century BC by the Ancient Greeks, who investigated and discussed properties of oblong , triangular , and square numbers ...