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A362765
Number of nonisomorphic 3-sets of permutations of an n-set.
3
0, 0, 6, 116, 2494, 87984, 4250015, 271412031, 21965480315, 2195837248568, 265649147125826, 38249422194113490, 6463715127098722285, 1266831272477388372744, 285028258253204630333567, 72965650731125156284328720, 21086743012582217859035501699
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OFFSET
1,3
COMMENTS
Isomorphism is up to permutation of the elements of the n-set.
LINKS
Andrew Howroyd,
Table of n, a(n) for n = 1..50
EXAMPLE
The a(3)=6 sets with permutations shown in cycle notation are:
{(1)(2)(3), (1)(23), (12)(3)},
{(1)(2)(3), (1)(23), (123)},
{(1)(2)(3), (123), (132)},
{(1)(23), (12)(3), (123)},
{(1)(23), (12)(3), (13)(2)},
{(1)(23), (123), (132)}.
CROSSREFS
Column k=3 of
A362763
.
Cf.
A362646
,
A362764
.
Sequence in context:
A052465
A229582
A113015
*
A024275
A287652
A259064
Adjacent sequences:
A362762
A362763
A362764
*
A362766
A362767
A362768
KEYWORD
nonn
AUTHOR
Andrew Howroyd
, May 03 2023
STATUS
approved
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Last modified June 9 13:21 EDT 2024. Contains 373240 sequences. (Running on oeis4.)