# A The "Beautiful" Formula

1. May 12, 2016

### a1call

2. May 12, 2016

### Staff: Mentor

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. May 12, 2016