Hexagonal pyramidal number: Difference between revisions

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#REDIRECT [[Pyramidal number]]

A '''hexagonal [[pyramidal number]]''' is a number formed by adding the first few [[hexagonal numbers]]. The first few numbers are:

{{R from merge}}

:1, 7, 22, 50, 95, 161, 252, 372, 525, 715, 946, 1222, 1547, 1925 {{OEIS|id=A002412}}

The numbers have the form:

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

== References ==

*[http://mathworld.wolfram.com/HexagonalPyramidalNumber.html Hexagonal pyramidal number at MathWorld]

{{Classes of natural numbers}}

{{numtheory-stub}}

[[Category:Figurate numbers]]