OFFSET
2,2
COMMENTS
The initial term is the four element diamond shape lattice.
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 2..400
Gábor Czédli, Tamás Dékány, Gergő Gyenizse, Júlia Kulin, The number of slim rectangular lattices, Algebra Universalis, 2016, Volume 75, Issue 1, pp 33-50
FORMULA
a(n) ~ exp(2) * n! / (2*n^2). - Vaclav Kotesovec, Jun 30 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Tamas Dekany, Jun 06 2016
STATUS
approved