A114587 - cp's OEIS frontend

A114587 Number of peaks at odd levels in all hill-free Dyck paths of semilength n+3 (a hill in a Dyck path is a peak at level 1).

n	a(n)
0	1
1	4
2	17
3	68
4	269
5	1056
6	4132
7	16144
8	63046
9	246228
10	962019
11	3760700
12	14710589
13	57581696
14	225546488
15	884059808
16	3467476430
17	13608852968
18	53443415522
19	210000136136
20	825630208466
21	3247733377664
22	12781815016232
23	50328168273408

[1, 4, 17, 68, 269, 1056, 4132, 16144, 63046, 246228, 962019, 3760700, 14710589, 57581696, 225546488, 884059808, 3467476430, 13608852968, 53443415522, 210000136136, 825630208466, 3247733377664, 12781815016232, 50328168273408]

cp's OEIS Frontend

A114587 Number of peaks at odd levels in all hill-free Dyck paths of semilength n+3 (a hill in a Dyck path is a peak at level 1).

Table of values

List of values