A121483 - cp's OEIS frontend

A121483 Number of peaks at odd level in all nondecreasing Dyck paths of semilength n. A nondecreasing Dyck path is a Dyck path for which the sequence of the altitudes of the valleys is nondecreasing.

n	a(n)
1	1
2	2
3	6
4	19
5	56
6	167
7	487
8	1411
9	4047
10	11527
11	32617
12	91790
13	257065
14	716896
15	1991792
16	5515535
17	15227846
18	41930133
19	115176023
20	315676425
21	863475561
22	2357539227
23	6425887551
24	17487572124
25	47522431681
26	128969086382
27	349567320762

[1, 2, 6, 19, 56, 167, 487, 1411, 4047, 11527, 32617, 91790, 257065, 716896, 1991792, 5515535, 15227846, 41930133, 115176023, 315676425, 863475561, 2357539227, 6425887551, 17487572124, 47522431681, 128969086382, 349567320762]

cp's OEIS Frontend

A121483 Number of peaks at odd level in all nondecreasing Dyck paths of semilength n. A nondecreasing Dyck path is a Dyck path for which the sequence of the altitudes of the valleys is nondecreasing.

Table of values

List of values