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NaturalMajorIndex on StandardTableau ​

The sum of the natural descents, the entries whose successor is in a strictly higher row.

On StandardTableau

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

Live

Distribution

Over StandardTableaux at each size, tallied here in your browser; sizes past 6 are not offered.

FindStat St001696

The natural major index of a standard Young tableau.

ObjectValue
[]0
[[1]]0
[[1,2]]0
[[1,2,3]]0
[[1],[2]]0
[[1,2,3,4]]0
[[1,2],[3]]0
[[1,3],[2]]2

Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St001696 has the rest.