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Number of labeled order relations on n nodes in which longest chain has n-2 nodes.
1

%I #7 Mar 16 2021 08:30:30

%S 1,86,2310,42960,712320,11481120,186671520,3116534400,53907638400,

%T 970417324800,18217668268800

%N Number of labeled order relations on n nodes in which longest chain has n-2 nodes.

%D L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 60.

%Y A column or diagonal of triangle in A342587.

%K nonn

%O 3,2

%A _N. J. A. Sloane_, Jul 10 2000

%E Extended to n=13 by _Brendan McKay_, Mar 16 2021