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CouplesAreForeverGrundyValue on IntegerPartition ​

The Grundy value of the game that splits a part above 2 into two parts: the nim-sum of the values of the parts, each the least value missing from the nim-sums over its splits.

On IntegerPartition

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

Live

Distribution

Over IntegerPartitions at each size, tallied here in your browser; sizes past 30 are not offered.

FindStat St000752

The Grundy value for the game 'Couples are forever' on an integer partition.

ObjectValue
[]0
[1]0
[2]0
[3]1
[4]2
[5]0
[6]1
[7]2

Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St000752 has the rest.