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COMBINATORICS
1998

Permutations which are the Union of an Increasing and a Decreasing Subsequence

13 years 11 months ago
Permutations which are the Union of an Increasing and a Decreasing Subsequence
It is shown that there are 2n n − n−1 m=0 2n−m−1 2m m permutations which are the union of an increasing sequence and a decreasing sequence. 1991 Mathematics Subject Classification 05A15 Submitted: December 1, 1997; Accepted: January 10, 1998
M. D. Atkinson
Added 21 Dec 2010
Updated 21 Dec 2010
Type Journal
Year 1998
Where COMBINATORICS
Authors M. D. Atkinson
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