A278590 a(n) = A278589(n)/2^n.

1, 1, 4, 40, 778, 25306

Offset

0,3

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, A278589.

Sequence in context: A258662 A140701 A277748 * A370086 A087047 A211035

Adjacent sequences: A278587 A278588 A278589 * A278591 A278592 A278593

Keyword

nonn,more

Author

N. J. A. Sloane, Dec 02 2016

Status

approved