A279203 - OEIS

%I #14 Dec 16 2016 15:26:10

%S 1,1,6,81,2774,162945

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

%H Samuele Giraudo, S. Vialette, <a href="https://arxiv.org/abs/1601.05962">Unshuffling Permutations</a>, arXiv preprint arXiv:1601.05962 [cs.DS], 2016.

%Y Cf. A279200, A279201, A279202.

%K nonn,more

%O 0,3

%A _N. J. A. Sloane_, Dec 15 2016