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A279203
Number of square permutations of 2n things modulo the operations of mirror image, complement, and inverse.
1
1, 1, 6, 81, 2774, 162945
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..5.
Samuele Giraudo, S. Vialette,
Unshuffling Permutations
, arXiv preprint arXiv:1601.05962 [cs.DS], 2016.
CROSSREFS
Cf.
A279200
,
A279201
,
A279202
.
Sequence in context:
A204264
A076282
A121790
*
A320993
A032491
A135624
Adjacent sequences:
A279200
A279201
A279202
*
A279204
A279205
A279206
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Dec 15 2016
STATUS
approved
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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)