Number of lattices on n unlabeled nodes, up to duality.
A373922
Number of lattices on n unlabeled nodes, up to duality.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =4a(6) =11a(7) =33a(8) =129a(9) =577a(10) =3113a(11) =19092a(12) =132318a(13) =1011665
External references
- oeis: A373922