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A099949
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Number of crossing partitions of n.
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1
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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
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listen;
history;
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OFFSET
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4,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn,easy,nice
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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