A058803 Vertically indecomposable lattices on n labeled nodes.

1, 1, 2, 0, 12, 140, 2910, 83202, 3170216, 154933704, 9441522810, 701275774430, 62304994315212, 6517432341289740, 791949368757587222, 110496962589020946330, 17525486812000086847440

Offset

0,3

Links

Table of n, a(n) for n=0..16.

Crossrefs

a(n)=A058804(n)*n=A058805(n)*n*(n-1).

Sequence in context: A269889 A293567 A293494 * A193202 A294463 A107700

Adjacent sequences: A058800 A058801 A058802 * A058804 A058805 A058806

Keyword

nonn,hard

Author

Christian G. Bower, Dec 28 2000

Status

approved