A278589 Number of equivalence classes under the fixed-point-free braid relation B_{FPF}(w_0).

1, 2, 16, 320, 12448, 809792

Offset

0,2

Links

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

Z. Hamaker, E. Marberg, B. Pawlowski, Involution words II: braid relations and atomic structures, arXiv preprint arXiv:1601.02269, 2016. See Remark following Th. 6.18.

Crossrefs

Cf. A212417, A278590.

Sequence in context: A188867 A282787 A137729 * A171212 A282392 A336522

Adjacent sequences: A278586 A278587 A278588 * A278590 A278591 A278592

Keyword

nonn,more

Author

N. J. A. Sloane, Dec 02 2016

Status

approved