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figurate number




A number sequence found by creating consecutive geometrical figures from arrangements of equally spaced points. Here is an example:

1 3 5 7
* * * *
  ** * *
    *** *
      ****


The points can be arranged in one, two, three, or more dimensions. There are many different kinds of figurate numbers, such as polygonal numbers and tetrahedral numbers.


Related category

   • TYPES OF NUMBERS