A378114 - cp's OEIS frontend

A378114 Number of 3-tuples (p_1, p_2, p_3) of Dyck paths of semilength n, such that each p_i is never below p_{i-1} and the upper path p_3 only touches the x-axis at its endpoints.

n	a(n)
0	1
1	1
2	3
3	23
4	265
5	3942
6	70395
7	1445700
8	33188889
9	834702890
10	22656163450
11	656075013591
12	20085981787831
13	645418018740113
14	21637970282382744
15	753157297564682541
16	27105935164769925549
17	1005184072184843625837
18	38295251586474334236780
19	1495061191885030011433707

[1, 1, 3, 23, 265, 3942, 70395, 1445700, 33188889, 834702890, 22656163450, 656075013591, 20085981787831, 645418018740113, 21637970282382744, 753157297564682541, 27105935164769925549, 1005184072184843625837, 38295251586474334236780, 1495061191885030011433707]

cp's OEIS Frontend

A378114 Number of 3-tuples (p_1, p_2, p_3) of Dyck paths of semilength n, such that each p_i is never below p_{i-1} and the upper path p_3 only touches the x-axis at its endpoints.

Table of values

List of values