A128722 - cp's OEIS frontend

A128722 Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k hills (i.e., peaks at level 1) (0 <= k <= n).

n	a(n)
0	1
1	0
2	1
3	2
4	0
5	1
6	6
7	3
8	0
9	1
10	22
11	9
12	4
13	0
14	1
15	84
16	35
17	12
18	5
19	0
20	1
21	334
22	138
23	49
24	15
25	6
26	0
27	1
28	1368
29	563
30	198
31	64
32	18
33	7
34	0
35	1
36	5734
37	2352
38	825
39	264
40	80
41	21
42	8
43	0
44	1
45	24480
46	10015
47	3504
48	1121
49	336
50	97
51	24
52	9
53	0
54	1
55	106086
56	43308
57	15123
58	4833
59	1452
60	414
61	115
62	27
63	10
64	0
65	1

[1, 0, 1, 2, 0, 1, 6, 3, 0, 1, 22, 9, 4, 0, 1, 84, 35, 12, 5, 0, 1, 334, 138, 49, 15, 6, 0, 1, 1368, 563, 198, 64, 18, 7, 0, 1, 5734, 2352, 825, 264, 80, 21, 8, 0, 1, 24480, 10015, 3504, 1121, 336, 97, 24, 9, 0, 1, 106086, 43308, 15123, 4833, 1452, 414, 115, 27, 10, 0, 1]

cp's OEIS Frontend

A128722 Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k hills (i.e., peaks at level 1) (0 <= k <= n).

Table of values

List of values