OFFSET
3,3
LINKS
Gábor Czédli, Minimum-sized generating sets of the direct powers of the free distributive lattice on three generators and a Sperner theorem, arXiv:2309.13783 [math.CO], 2023. See formulas (3.6) at p. 4 and (4.15) at p. 8.
FORMULA
MATHEMATICA
a[n_]:=Floor[n!(3Floor[n/2]!Ceiling[n/2]! + 3Floor[(n+2)/2]!Ceiling[(n-2)/2]! - 6Floor[n/2]!Ceiling[(n-2)/2]!)^(-1)]; Array[a, 37, 3]
CROSSREFS
KEYWORD
nonn
AUTHOR
Stefano Spezia, Sep 29 2023
STATUS
approved