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

A055534

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

Terms

    a(0) =1a(1) =86a(2) =2310a(3) =42960a(4) =712320a(5) =11481120a(6) =186671520a(7) =3116534400a(8) =53907638400a(9) =970417324800

External references