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 A274763 Number of linear extensions of the one-level grid poset G[(1^n), (1^(n-1)), (0^(n-1))]. 2
 1, 10, 215, 7200, 328090, 18914190, 1318595475, 107813147200, 10112867995550, 1070215246700100, 126122386636230944, 16378717184245442560, 2323753119238888095744, 357594668486650176208896, 59323244552378855471448064 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The definition of a one-level grid poset can be found in the Pan links. The number of linear extensions of the one-level grid poset G[(0^n), (0^(n-1)), (0^(n-1))] is given by Catalan number A000108(n) and the number of linear extensions of the one-level grid poset G[(1^n), (0^(n-1)), (0^(n-1))] is given by A274644(n). LINKS Ran Pan, Problem 1, Project P. CROSSREFS Cf. A000108, A274644. Sequence in context: A211912 A213788 A278125 * A002967 A243476 A305107 Adjacent sequences:  A274760 A274761 A274762 * A274764 A274765 A274766 KEYWORD nonn AUTHOR Ran Pan, Jul 05 2016 STATUS approved

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Last modified October 23 14:54 EDT 2019. Contains 328345 sequences. (Running on oeis4.)