Factorial2

n!!

gives the double factorial of n.

Details

  • Mathematical function, suitable for both symbolic and numerical manipulation.
  • .
  • n!! is a product of even numbers for n even, and odd numbers for n odd.
  • Factorial2 can be evaluated to arbitrary numerical precision.
  • Factorial2 automatically threads over lists.

Examples

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Basic Examples  (2)

Integer values:

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Evaluate numerically:

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Scope  (5)

Generalizations & Extensions  (3)

Applications  (1)

Properties & Relations  (8)

Possible Issues  (3)

Neat Examples  (3)

See Also

Factorial  Gamma  Pochhammer

Tutorials

Introduced in 1988
(1.0)