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 A263860 Triangle read by rows: T(n,k) (n>=0, k>=1) is the number of posets with n elements and k linear extensions. 1
 1, 1, 1, 1, 1, 2, 1, 0, 0, 1, 1, 3, 2, 2, 1, 3, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 4, 3, 5, 3, 7, 2, 5, 2, 4, 1, 4, 0, 2, 2, 2, 0, 2, 0, 4, 0, 0, 0, 2, 1, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,6 COMMENTS Row sums give A000112. LINKS FindStat - Combinatorial Statistic Finder, The number of linear extensions of a poset. EXAMPLE Triangle begins: 1, 1, 1,1, 1,2,1,0,0,1, 1,3,2,2,1,3,0,2,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1, ... CROSSREFS Cf. A000112. Sequence in context: A136567 A109708 A035468 * A051777 A262709 A107628 Adjacent sequences:  A263857 A263858 A263859 * A263861 A263862 A263863 KEYWORD nonn,tabf AUTHOR Christian Stump, Oct 28 2015 STATUS approved

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Last modified January 15 20:47 EST 2019. Contains 319184 sequences. (Running on oeis4.)