A316390 - cp's OEIS frontend

A316390 Number of permutations p of [n] such that the up-down signature of 0,p has nonnegative partial sums with a maximal value of three.

n	a(n)
3	1
4	3
5	28
6	130
7	1263
8	8090
9	88101
10	724189
11	8887448
12	89401804
13	1229179691
14	14638611036
15	223711095367
16	3078744103979
17	51892788554614
18	810254535452378
19	14955918856848519
20	261173044555806630
21	5245841953983851853
22	101285541723126490941
23	2201267668629421856324

[1, 3, 28, 130, 1263, 8090, 88101, 724189, 8887448, 89401804, 1229179691, 14638611036, 223711095367, 3078744103979, 51892788554614, 810254535452378, 14955918856848519, 261173044555806630, 5245841953983851853, 101285541723126490941, 2201267668629421856324]

cp's OEIS Frontend

A316390 Number of permutations p of [n] such that the up-down signature of 0,p has nonnegative partial sums with a maximal value of three.

Table of values

List of values