OccurrencesOfInitial2Dash13 on Permutation
Triples 1, j, j+1 ordered as 213 (|2-13).
FindStat titles this |21-3.
Called as CombinatorialStat(x, "OccurrencesOfInitial2Dash13"). The head's page has its examples.
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FindStat St001085
The number of occurrences of the vincular pattern |21-3 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] | 1 |
[2,3,1] | 0 |
Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St001085 has the rest.