OFFSET
0,4
COMMENTS
A partial lattice is a poset where every pair of points has a unique least upper (greatest lower) bound or has no upper (lower) bound.
LINKS
N. J. A. Sloane, Transforms
FORMULA
Inverse Euler transform of A006966(n-2) (lattices).
MATHEMATICA
(* EulerInvTransform is defined in A022562 *)
Join[{1}, EulerInvTransform[Drop[A006966, 3]]] (* Jean-François Alcover, May 10 2019, updated Mar 17 2020 *)
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Christian G. Bower, revised Dec 28 2000
EXTENSIONS
a(17) (from A006966) from Jean-François Alcover, May 10 2019
a(18) (using A006966) from Alois P. Heinz, May 10 2019
STATUS
approved