Pyramidal number

（重定向自Pyramidal numbers）

A pyramidal number is a figurate number that represents a pyramid with a polygonal base and a given number of triangular sides. The term usually refers to square pyramidal numbers, which have a square base with four sides, but it can also refer to:

as well as to pyramids with higher numbers of sides

单词	Pyramidal numbers
释义	Pyramidal numbers 英语百科 Pyramidal number （重定向自Pyramidal numbers） A pyramidal number is a figurate number that represents a pyramid with a polygonal base and a given number of triangular sides. The term usually refers to square pyramidal numbers, which have a square base with four sides, but it can also refer to: as well as to pyramids with higher numbers of sides
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