Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of eight.

A320982

Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of eight.

Terms

    a(0) =0a(1) =1a(2) =9a(3) =2061a(4) =20736a(5) =1507293a(6) =17118482a(7) =849597609a(8) =10896848134a(9) =459634150710

External references