A362646 Number of nonisomorphic unordered triples of permutations of an n-set.

1, 1, 4, 17, 159, 2655, 88885, 4255594, 271455237, 21965858675, 2195840991306, 265649187979346, 38249422682143111, 6463715133421876832, 1266831272565696798499, 285028258254526750598805, 72965650731146278648727481, 21086743012582576506980525584

Offset

0,3

Comments

Isomorphism is up to permutation of the elements of the n-set.

Links

Andrew Howroyd, Table of n, a(n) for n = 0..50

Crossrefs

Column k=3 of A362644.

Cf. A362645, A362650.

Sequence in context: A320444 A129436 A063857 * A072654 A094545 A156633

Adjacent sequences: A362643 A362644 A362645 * A362647 A362648 A362649

Keyword

nonn

Author

Andrew Howroyd, May 01 2023

Status

approved