A231385 - cp's OEIS frontend

A231385 Number of permutations of [n] avoiding simultaneously consecutive step patterns UUD, UDU, DUU (U=up, D=down).

n	a(n)
0	1
1	1
2	2
3	6
4	13
5	39
6	158
7	674
8	3304
9	19511
10	122706
11	834131
12	6416525
13	52909708
14	462097526
15	4395014406
16	44626369587
17	476351029850
18	5414386451909
19	65177788719791
20	821378978885730
21	10880928171304446
22	151423268838929524
23	2197946731864495343
24	33278572455563069142

[1, 1, 2, 6, 13, 39, 158, 674, 3304, 19511, 122706, 834131, 6416525, 52909708, 462097526, 4395014406, 44626369587, 476351029850, 5414386451909, 65177788719791, 821378978885730, 10880928171304446, 151423268838929524, 2197946731864495343, 33278572455563069142]

cp's OEIS Frontend

A231385 Number of permutations of [n] avoiding simultaneously consecutive step patterns UUD, UDU, DUU (U=up, D=down).

Table of values

List of values