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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 (list; graph; refs; listen; history; text; internal format)
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 April 16 12:45 EDT 2021. Contains 343037 sequences. (Running on oeis4.)