A099949 Number of crossing partitions of n.
1, 5, 20, 84, 388, 1951, 10529, 60478, 367953, 2362503, 15955673, 113015123, 837307541, 6473306155, 52110629576, 435951806195, 3783475965645, 34007779661168, 316120859847935, 3034730002671251, 30048957645720682, 306529788241138211, 3217941347005747296, 34730178825735671711, 384990885899299757336, 4379518943963832643173, 51083106730348426001558
Offset: 4
Links
- M. Klazar, Bell numbers, their relatives and algebraic differential equations, J. Combin. Theory, A 102 (2003), 63-87.
Extensions
More terms from Vladeta Jovovic, Jul 11 2007