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A polygonal number is a type of figurate number that is a generalization of triangular, square, etc., numbers to an -gon for arbitrary positive integer . The diagram graphically illustrates the process by which the th -gonal number is generated.
Contributed by: Eric W. Weisstein (March 2011)
Open content licensed under CC BY-NC-SA
Wolfram Demonstrations Project
Published: March 7 2011