PartsEqualOne on IntegerPartition

Parts equal to 1.

On IntegerPartition

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

Live

FindStat St000475

The number of parts equal to 1 in a partition.

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

Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St000475 has the rest.