A243871 - cp's OEIS frontend

A243871 Number of Dyck paths of semilength n having exactly 1 occurrence of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)).

n	a(n)
5	1
6	3
7	10
8	35
9	124
10	454
11	1684
12	6305
13	23781
14	90209
15	343809
16	1315499
17	5050144
18	19442366
19	75034354
20	290203076
21	1124511549
22	4364693311
23	16966567970
24	66041815437
25	257378634365
26	1004167036295
27	3921726323436
28	15330264382726
29	59977821022143
30	234839855088313

[1, 3, 10, 35, 124, 454, 1684, 6305, 23781, 90209, 343809, 1315499, 5050144, 19442366, 75034354, 290203076, 1124511549, 4364693311, 16966567970, 66041815437, 257378634365, 1004167036295, 3921726323436, 15330264382726, 59977821022143, 234839855088313]

cp's OEIS Frontend

A243871 Number of Dyck paths of semilength n having exactly 1 occurrence of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)).

Table of values

List of values