Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of seven.
A320981
Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of seven.
Terms
- a(0) =0a(1) =1a(2) =8a(3) =1031a(4) =9379a(5) =486299a(6) =5084162a(7) =196352061a(8) =2352460536a(9) =81070646577
External references
- oeis: A320981