8!! |

8!!

Enter Multifactorial

Calculate the multifactorial 8!!

We have 2 exclamation symbols (!)

Start at 8

Iterate backwards in steps of 2

Stop when we hit 1 or below

Term 1

For term 1, we start with 8

Term 2

Subtract -1 x 2 = -2 to get n(n - -2)

(n - -2) → 8 - -2 = 6
Our factorial term is:
8(6)

Term 3

Subtract -1 x 2 = -2 to get n(n - -2)(n - -2)

(n - -2) → 8 - -2 = 4
Our factorial term is:
8(6)(4)

Term 4

Subtract -1 x 2 = -2 to get n(n - -2)(n - -2)(n - -2)

(n - -2) → 8 - -2 = 2
Our factorial term is:
8(6)(4)(2)

Build final multifactorial answer:

8!! = n(n - -2)(n - -2)(n - -2)...

8!! = 8(6)(4)(2)

8!! = 384

What is the Answer?

How does the Multifactorials Calculator work?

Free Multifactorials Calculator - Calculates the multifactorial n!(m)
This calculator has 1 input.

What 1 formula is used for the Multifactorials Calculator?

n!(m) = (n - m) * (n - m - m) * ... * 1

For more math formulas, check out our Formula Dossier

What 3 concepts are covered in the Multifactorials Calculator?

factorialThe product of an integer and all the integers below itmultifactorialgeneralisation of a factorial in which each element to be multiplied differs from the next by an integerpermutationa way in which a set or number of things can be ordered or arranged.
nPr = n!/(n - r)!

Example calculations for the Multifactorials Calculator

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8!!