OccurrencesOf3241Or4231 on Permutation
Quadruples ordered as 3241 or as 4231.
A permutation avoids both exactly when it is an input-restricted deque.
Called as CombinatorialStat(x, "OccurrencesOf3241Or4231"). The head's page has its examples.
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FindStat St000404
The number of occurrences of the pattern 3241 or of the pattern 4231 in a permutation.
| Object | Value |
|---|---|
[] | 0 |
[1] | 0 |
[1,2] | 0 |
[2,1] | 0 |
[1,2,3] | 0 |
[1,3,2] | 0 |
[2,1,3] | 0 |
[2,3,1] | 0 |
Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St000404 has the rest.