A006150 - cp's OEIS frontend

A006150 Number of 4-tuples (p_1, p_2, ..., p_4) of Dyck paths of semilength n, such that each p_i is never below p_{i-1}.

n	a(n)
0	1
1	1
2	5
3	55
4	1001
5	26026
6	884884
7	37119160
8	1844536720
9	105408179176
10	6774025632340
11	481155055944150
12	37259723952950625
13	3111129272480118750
14	277587585343361452500
15	26268551497229678505000
16	2620002484114994890890000
17	273961129317241857069150000
18	29896847445736985488399170000

[1, 1, 5, 55, 1001, 26026, 884884, 37119160, 1844536720, 105408179176, 6774025632340, 481155055944150, 37259723952950625, 3111129272480118750, 277587585343361452500, 26268551497229678505000, 2620002484114994890890000, 273961129317241857069150000, 29896847445736985488399170000]

cp's OEIS Frontend

A006150 Number of 4-tuples (p_1, p_2, ..., p_4) of Dyck paths of semilength n, such that each p_i is never below p_{i-1}.

Table of values

List of values