Emeric said:
I believe that the easily proved formula
sum(n!/k!, k=0..n) = [n!e]
is given in some form in many calculus books. I'd like to ask
the favor of some references.
Me: well, seqfans are supposed to know that the
first thing you do is look it up in the OEIS!
It is A000522, and there a lot of references!
Neil