- #1

- 85

- 5

Can someone please decipher the following "beautiful" formula for me?

http://mathworld.wolfram.com/ReciprocalMultifactorialConstant.html

m(19)=1/19!!!!!+?+?+.....

* What is the next/previous addend in the series sum?

Thanks in advance.

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- A
- Thread starter a1call
- Start date

- #1

- 85

- 5

Can someone please decipher the following "beautiful" formula for me?

http://mathworld.wolfram.com/ReciprocalMultifactorialConstant.html

m(19)=1/19!!!!!+?+?+.....

* What is the next/previous addend in the series sum?

Thanks in advance.

- #2

jedishrfu

Mentor

- 12,657

- 6,530

##m(n) = 1/( n! ) + 1/( n! * (n-1)! ) + 1/( n! * (n-1)! * (n-2)! ) + ...##

- #3

- 85

- 5

The article seems related to multifactorials with k being the number of exclamation marks, such as 2 marks for doublefactorial and more by similar extension.

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