Article ID Journal Published Year Pages File Type
4656261 Journal of Combinatorial Theory, Series A 2008 13 Pages PDF
Abstract

We find a formula for the number of permutations of [n] that have exactly s runs up and down. The formula is at once terminating, asymptotic, and exact. The asymptotic series is valid for n→∞, uniformly for s⩽(1−ϵ)n/logn (ϵ>0).

Related Topics
Physical Sciences and Engineering Mathematics Discrete Mathematics and Combinatorics