DistinctRepeatedParts on IntegerPartition

Distinct part sizes that occur at least twice.

On IntegerPartition

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

Live

FindStat St000257

The number of distinct parts of a partition that occur at least twice.

Object	Value
`[]`	`0`
`[1]`	`0`
`[2]`	`0`
`[3]`	`0`
`[4]`	`0`
`[5]`	`0`
`[6]`	`0`
`[7]`	`0`

Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St000257 has the rest.