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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. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,6
COMMENTS
Row sums give A000112.
Is this the same as A263858? - R. J. Mathar, Nov 03 2015
LINKS
FindStat - Combinatorial Statistic Finder, The number of facets in the chain polytope of the poset.
EXAMPLE
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,
...
CROSSREFS
Cf. A000112.
Sequence in context: A193387 A185982 A263858 * A263861 A357940 A133800
KEYWORD
nonn,tabf,more
AUTHOR
Christian Stump, Oct 28 2015
STATUS
approved

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Last modified March 18 22:34 EDT 2024. Contains 370951 sequences. (Running on oeis4.)