A121482 - cp's OEIS frontend

A121482 Number of nondecreasing Dyck paths of semilength n and having no peaks at odd level (n>=0). A nondecreasing Dyck path is a Dyck path for which the sequence of the altitudes of the valleys is nondecreasing.

n	a(n)
0	1
1	0
2	1
3	1
4	3
5	5
6	12
7	22
8	49
9	94
10	201
11	396
12	828
13	1656
14	3421
15	6899
16	14160
17	28686
18	58672
19	119156
20	243253
21	494688
22	1008860
23	2053168
24	4184892
25	8520248
26	17361293
27	35354517
28	72028485
29	146696143
30	298840769
31	608670551
32	1239888694
33	2525459305

[1, 0, 1, 1, 3, 5, 12, 22, 49, 94, 201, 396, 828, 1656, 3421, 6899, 14160, 28686, 58672, 119156, 243253, 494688, 1008860, 2053168, 4184892, 8520248, 17361293, 35354517, 72028485, 146696143, 298840769, 608670551, 1239888694, 2525459305]

cp's OEIS Frontend

A121482 Number of nondecreasing Dyck paths of semilength n and having no peaks at odd level (n>=0). 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