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.
Suggestion: You might also try Cody Problem 46034.
Solve

Solution Stats

70.59% Correct | 29.41% Incorrect
Last Solution submitted on Aug 26, 2024

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers10

Suggested Problems

More from this Author316

Problem Tags

permutations zigzag

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!