figurate number
Noun

figurate number (plural figurate numbers)

  1. (mathematics, number theory) A number#Noun|number equal#Adjective|equal to the number of dot#Noun|dots in a geometric figure#Noun|figure form#Verb|formed of dots. The series begins with unity and is formed so that subtracting each from the following, and treating the series so formed in the same way, by a continuation of the process, yields equal differences.



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