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A058165 Number of labeled lattices with fixed a fixed bottom and top. 1
1, 1, 3, 19, 213, 3761, 96373, 3377487, 154874569, 8980530625, 641008120761, 55110586506119, 5606337607922197, 664893010179107529, 90785224148218811149, 14119839142088335522351 (list; graph; refs; listen; history; internal format)
OFFSET

2,3

CROSSREFS

a(n)=A055512(n)/(n*(n-1))=A058164(n)/(n-1).

Sequence in context: A204262 A165356 A000275 * A074707 A135749 A005647

Adjacent sequences:  A058162 A058163 A058164 * A058166 A058167 A058168

KEYWORD

nonn,hard

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Nov 15 2000

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Last modified February 16 06:27 EST 2012. Contains 205860 sequences.