Number of hierarchical models on n labeled factors or variables with linear terms forced. Also number of antichain covers of a labeled n-set.
A006126
Number of hierarchical models on n labeled factors or variables with linear terms forced. Also number of antichain covers of a labeled n-set.
Terms
- a(0) =2a(1) =1a(2) =2a(3) =9a(4) =114a(5) =6894a(6) =7785062
External references
- oeis: A006126