98827domain: NAppears in sequencesa(n) = 3*n^4 + 6*n^3 - 3*n + 1.at n=13A181475Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value of ten.at n=4A320984Numbers which can written in exactly four ways as a sum of two distinct nonzero pentagonal numbers.at n=20A333014