A263862 Triangle read by rows: T(n,k) (n>=0, k>=n+1) is the number of posets with n elements and whose chain polytope has k facets.
1, 1, 1, 1, 1, 3, 1, 1, 7, 6, 2, 1, 13, 25, 18, 4, 2, 1, 22, 80, 111, 60, 32, 7, 4, 1
Offset: 0
Examples
Triangle begins: 1, 1, 1,1, 1,3,1, 1,7,6,2, 1,13,25,18,4,2, 1,22,80,111,60,32,7,4,1, ...
Links
- FindStat - Combinatorial Statistic Finder, The number of facets in the chain polytope of the poset.
Crossrefs
Cf. A000112.
Comments