Number of matrices with n columns whose rows do not cover each other. Also antichain covers of an unlabeled n-set.
A007411
Number of matrices with n columns whose rows do not cover each other. Also antichain covers of an unlabeled n-set.
Terms
- a(0) =1a(1) =4a(2) =19a(3) =179a(4) =16142a(5) =489996794
External references
- oeis: A007411