OccurrencesOf13Over2Openers1Closers2 on SetPartition
Occurrences of the pattern 13/2 with 1 the least element of its block and 2 the greatest element of its block.
Called as CombinatorialStat(x, "OccurrencesOf13Over2Openers1Closers2"). The head's page has its examples.
Live
Distribution
Over SetPartitions at each size, tallied here in your browser; sizes past 10 are not offered.
FindStat St000581
The number of occurrences of the pattern {{1,3},{2}} such that 1 is minimal, 2 is maximal.
| Object | Value |
|---|---|
{{1,2}} | 0 |
{{1,2,3}} | 0 |
{{1},{2}} | 0 |
{{1,2,3,4}} | 0 |
{{1,2},{3}} | 0 |
{{1,3},{2}} | 1 |
{{1},{2,3}} | 0 |
{{1,2,3,4,5}} | 0 |
Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St000581 has the rest.