554432537domain: NAppears in sequencesNumber of permutations p of [2n] such that the up-down signature of 0,p has nonnegative partial sums with a maximal value of n.at n=7A266947Number of permutations p of [n] such that the up-down signature of 0,p has nonnegative partial sums with a maximal value of seven.at n=7A316394