MathDB
Problems
Contests
National and Regional Contests
PEN Problems
PEN N Problems
2
2
Part of
PEN N Problems
Problems
(1)
N 2
Source:
5/25/2007
Let
a
n
a_{n}
a
n
be the last nonzero digit in the decimal representation of the number
n
!
n!
n
!
. Does the sequence
a
1
a_{1}
a
1
,
a
2
a_{2}
a
2
,
a
3
a_{3}
a
3
,
⋯
\cdots
⋯
become periodic after a finite number of terms?
More Sequences