FlagWeakExcedance on SignedPermutation
Twice the weak excedances plus the negative entries.
FindStat's St001817. A weak excedance is an entry p(i) >= i.
Called as CombinatorialStat(x, "FlagWeakExcedance"). The head's page has its examples.
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Distribution
Over SignedPermutations at each size, tallied here in your browser; sizes past 6 are not offered.
FindStat St001817
The number of flag weak exceedances of a signed permutation.
| Object | Value |
|---|---|
[1] | 2 |
[-1] | 1 |
[1,2] | 4 |
[2,1] | 2 |
[-1,2] | 3 |
[-2,1] | 1 |
[1,-2] | 3 |
[2,-1] | 3 |
Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St001817 has the rest.