A279203 Number of square permutations of 2n things modulo the operations of mirror image, complement, and inverse.

1, 1, 6, 81, 2774, 162945

Offset

0,3

Links

Table of n, a(n) for n=0..5.

Samuele Giraudo and Stéphane 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,changed

Author

N. J. A. Sloane, Dec 15 2016

Status

approved