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OccurrencesOfUDU on DyckPath ​

Occurrences of an up, a down and an up step.

On DyckPath

Called as CombinatorialStat(x, "OccurrencesOfUDU"). The head's page has its examples.

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Distribution

Over DyckPaths at each size, tallied here in your browser; sizes past 10 are not offered.

FindStat St000932

The number of occurrences of the pattern UDU in a Dyck path.

ObjectValue
[1,0,1,0]1
[1,1,0,0]0
[1,0,1,0,1,0]2
[1,0,1,1,0,0]1
[1,1,0,0,1,0]0
[1,1,0,1,0,0]1
[1,1,1,0,0,0]0
[1,0,1,0,1,0,1,0]3

Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St000932 has the rest.

FindStat St001067

The number of simple modules of dominant dimension at least two in the linear Nakayama algebra corresponding to a Dyck path.

ObjectValue
[1,0]0
[1,0,1,0]1
[1,1,0,0]0
[1,0,1,0,1,0]2
[1,0,1,1,0,0]1
[1,1,0,0,1,0]0
[1,1,0,1,0,0]1
[1,1,1,0,0,0]0

Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St001067 has the rest.

FindStat St001223

Number of indecomposable projective non-injective modules P such that the modules X and Y in a an Auslander-Reiten sequence ending at P are torsionless.

ObjectValue
[1,0]0
[1,0,1,0]1
[1,1,0,0]0
[1,0,1,0,1,0]2
[1,0,1,1,0,0]1
[1,1,0,0,1,0]0
[1,1,0,1,0,0]1
[1,1,1,0,0,0]0

Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St001223 has the rest.