Antisingletons on SetPartition
Elements i with i + 1 in the same block, counting n + 1 as 1.
Called as CombinatorialStat(x, "Antisingletons"). The head's page has its examples.
Live
FindStat St000248
The number of anti-singletons of a set partition.
| Object | Value |
|---|---|
{{1,2}} | 2 |
{{1,2,3}} | 3 |
{{1},{2}} | 0 |
{{1,2,3,4}} | 4 |
{{1,2},{3}} | 1 |
{{1,3},{2}} | 1 |
{{1},{2,3}} | 1 |
{{1,2,3,4,5}} | 5 |
Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St000248 has the rest.