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A362828
Number of n-tuples of permutations of [n] that pairwise commute.
2
1, 1, 4, 48, 2016, 130440, 30672720, 11608682400, 12055770800640, 24154259257215360, 117792549941415955200, 1161512734993746635808000, 25629823970496421449477580800, 1215203193235691517749414518195200, 123585796012441765074167804498857267200
OFFSET
0,3
COMMENTS
Two permutations x,y on [n] commute if x*y = y*x.
LINKS
Tad White, Counting Free Abelian Actions, arXiv preprint arXiv:1304.2830 [math.CO], 2013.
CROSSREFS
Main diagonal of A362827.
Cf. A362823.
Sequence in context: A346949 A011266 A360820 * A197927 A100568 A112693
KEYWORD
nonn
AUTHOR
Andrew Howroyd, May 08 2023
STATUS
approved