Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of five.
A320979
Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of five.
Terms
- a(0) =0a(1) =1a(2) =6a(3) =254a(4) =1835a(5) =47673a(6) =416221a(7) =9565156a(8) =99383961a(9) =2250472801a(10) =27333591309a(11) =635688426842
External references
- oeis: A320979