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Search: id:A058804
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A058804 Number of labeled vertically indecomposable lattices with a fixed bottom. +0
3
1, 1, 1, 0, 3, 28, 485, 11886, 396277, 17214856, 944152281, 63752343130, 5192082859601, 501340949329980, 56567812054113373, 7366464172601396422, 1095342925750005427965, 184246192159690980312976 (list; graph; listen)
OFFSET

0,5

FORMULA

E.g.f. of a(n+1): A(x)=(B(x)-1)/B(x) where B(x) is e.g.f. of A058164(n+1).

CROSSREFS

a(n)=A058803(n)/n=A058805(n)*(n-1).

Sequence in context: A143636 A060545 A108288 this_sequence A005328 A161971 A156315

Adjacent sequences: A058801 A058802 A058803 this_sequence A058805 A058806 A058807

KEYWORD

nonn,hard

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Dec 28 2000

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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