Problem 46037. Count alternating permutations
In an alternating permutation of numbers 1 to n, the numbers are arranged so that they alternately increase and decrease. For example, there are five alternating permutations of the numbers 1, 2, 3, and 4:
1 3 2 4
1 4 2 3
2 3 1 4
2 4 1 3
3 4 1 2
Write a function to count the alternating permutations for a set of n numbers.
Solution Stats
Problem Comments
Solution Comments
Show commentsProblem Recent Solvers9
Suggested Problems
-
3721 Solvers
-
271 Solvers
-
391 Solvers
-
Set some matrix elements to zero
510 Solvers
-
Solving Quadratic Equations (Version 1)
480 Solvers
More from this Author250
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!