Problems
Contests

National and Regional ContestsUSA ContestsUSA - College-Hosted EventsHarvard-MIT Mathematics Tournament2000 Harvard-MIT Mathematics Tournament46

46

Part of 2000 Harvard-MIT Mathematics Tournament

Problems(1)

2000 Guts #46: Sum equals an integer

Source:

For what integer values of

n

1+n+\frac{n^2}{2}+\cdots +\frac{n^n}{n!}