A058802 Vertically decomposable lattices on n unlabeled nodes.

1, 1, 3, 8, 26, 96, 414, 2040, 11432, 72022, 503973, 3875329, 32429747, 292872455, 2834089224, 29209213572, 318979706486

Offset: 3

Author

Christian G. Bower, Dec 28 2000

Keywords

• nonn
• hard

Links

• J. Heitzig and J. Reinhold, Counting finite lattices, preprint no. 298, Institut für Mathematik, Universität Hanover, Germany, 1999.
• J. Heitzig and J. Reinhold, Counting finite lattices, Algebra Universalis, 48 (2002), 43-53.

Crossrefs

Cf. A006966, A058800.

Formula

a(n) = A006966(n) - A058800(n).