A055534 Number of labeled order relations on n nodes in which longest chain has n-2 nodes.

1, 86, 2310, 42960, 712320, 11481120, 186671520, 3116534400, 53907638400, 970417324800, 18217668268800

Offset: 3

Author

N. J. A. Sloane, Jul 10 2000

Keywords

• nonn

References

• L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 60.

Crossrefs

A column or diagonal of triangle in A342587.

Extensions

Extended to n=13 by Brendan McKay, Mar 16 2021