A371727 - cp's OEIS frontend

A371727 Number of Dyck paths of semilength n such that neighboring peaks differ in height by exactly one and first and last peak are at height one.

n	a(n)
0	1
1	1
2	0
3	0
4	1
5	0
6	0
7	2
8	2
9	1
10	5
11	12
12	16
13	28
14	65
15	128
16	237
17	478
18	990
19	2006
20	4086
21	8469
22	17644
23	36826
24	77305
25	163195
26	345798
27	735302
28	1569379
29	3360821
30	7218566
31	15548176
32	33578893
33	72698472
34	157755230
35	343071238
36	747603060
37	1632264655
38	3570221869
39	7822430724

[1, 1, 0, 0, 1, 0, 0, 2, 2, 1, 5, 12, 16, 28, 65, 128, 237, 478, 990, 2006, 4086, 8469, 17644, 36826, 77305, 163195, 345798, 735302, 1569379, 3360821, 7218566, 15548176, 33578893, 72698472, 157755230, 343071238, 747603060, 1632264655, 3570221869, 7822430724]

cp's OEIS Frontend

A371727 Number of Dyck paths of semilength n such that neighboring peaks differ in height by exactly one and first and last peak are at height one.

Table of values

List of values