A058804 Number of labeled vertically indecomposable lattices with a fixed bottom.

1, 1, 1, 0, 3, 28, 485, 11886, 396277, 17214856, 944152281, 63752343130, 5192082859601, 501340949329980, 56567812054113373, 7366464172601396422, 1095342925750005427965, 184246192159690980312976

Offset: 0

Author

Christian G. Bower, Dec 28 2000

Keywords

• nonn
• hard

Crossrefs

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

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).