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A099949 Number of crossing partitions of n. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

LINKS

Table of n, a(n) for n=4..30.

M. Klazar, Bell numbers, their relatives and algebraic differential equations, J. Combin. Theory, A 102 (2003), 63-87.

CROSSREFS

Sequence in context: A056884 A006749 A002213 * A006231 A069007 A126987

Adjacent sequences:  A099946 A099947 A099948 * A099950 A099951 A099952

KEYWORD

nonn,easy,nice

AUTHOR

N. J. A. Sloane, Nov 12 2004

EXTENSIONS

More terms from Vladeta Jovovic, Jul 11 2007

STATUS

approved

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Last modified September 21 11:45 EDT 2019. Contains 327253 sequences. (Running on oeis4.)