Hexagonal pyramidal number: Difference between revisions

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A '''hexagonal [[pyramidal number]]''' is a number formed by adding the first few hexagonal numbers. The first few numbers are 1, 7, 22, 50, 95.

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A '''hexagonal [[pyramidal number]]''' is a number formed by adding the first few hexagonal numbers. The first few numbers are 1, 7, 22, 50, 95.

The numbers have the form:

<math>{n(n+1)(4n-1)/6}\over6</math>

== References ==