A263629 A sequence B(3,n) arising from the enumeration of braids.

15, 90, 602, 4060, 28356, 200088

Offset

2,1

Comments

It would be nice to have a recurrence.

References

Iris Anshel, Personal communication, Oct 23 2015.

Links

Table of n, a(n) for n=2..7.

Crossrefs

Cf. A263628.

Sequence in context: A005716 A292055 A263628 * A320524 A218408 A048630

Adjacent sequences: A263626 A263627 A263628 * A263630 A263631 A263632

Keyword

nonn,more

Author

N. J. A. Sloane, Oct 27 2015

Status

approved