A248382 Number of n-strand braids of length at most 2 in the dual monoid B_n^{+*}.
1, 4, 83, 556, 11124, 266944
Offset: 1
Links
- Philippe Biane, Patrick Dehornoy, Dual Garside structure of braids and free cumulants of products, arXiv:1407.1604 [math.CO], (7-July-2014)