A261994 Number of complemented lattices on n nodes.

1, 1, 1, 0, 1, 2, 6, 18, 71, 307, 1594, 9446, 63461

Offset: 0

Author

Jori Mäntysalo, Sep 08 2015

Keywords

• nonn
• more

References

• R. Belohlavek, V. Vychodil, Residual lattices of size <=12, Order 27 (2010) 147-161 doi:10.1007/s11083-010-9143-7, Table 6

Programs

Sage

for n in range(7):
    print(len([L for L in Posets(n) if L.is_lattice() and LatticePoset(L).is_complemented()]))