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Korea National Olympiad
1997 Korea National Olympiad
1
1
Part of
1997 Korea National Olympiad
Problems
(1)
Classic Old Combo
Source: 1997 Korea National Olympiad #1
3/18/2018
Let
f
(
n
)
f(n)
f
(
n
)
be the number of ways to express positive integer
n
n
n
as a sum of positive odd integers. Compute
f
(
n
)
.
f(n).
f
(
n
)
.
(If the order of odd numbers are different, then it is considered as different expression.)
partition
combinatorics