The "Beautiful" Formula

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  • Thread starter a1call
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  • #1
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  • #2
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I think there's a mistake in the MathWorld formula the summation of n=0 should be k=0

##m(n) = 1/( n! ) + 1/( n! * (n-1)! ) + 1/( n! * (n-1)! * (n-2)! ) + ...##
 
  • #3
85
5
Thank you for your reply jedishrfu,
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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