A191791 - cp's OEIS frontend

A191791 Triangle read by rows: T(n,k) is the number of length n left factors of Dyck paths having k UDUD's, where U=(1,1) and D=(1,-1).

n	a(n)
0	1
1	1
2	2
3	3
4	5
5	1
6	8
7	2
8	15
9	4
10	1
11	25
12	8
13	2
14	46
15	19
16	4
17	1
18	79
19	36
20	9
21	2
22	147
23	76
24	24
25	4
26	1
27	256
28	146
29	48
30	10
31	2
32	477
33	304
34	109
35	29
36	4
37	1
38	841
39	578
40	224
41	60
42	11
43	2
44	1570
45	1180
46	499
47	144
48	34
49	4
50	1
51	2791
52	2244
53	1002
54	312
55	72
56	12
57	2
58	5217
59	4525
60	2172
61	731
62	181
63	39
64	4
65	1
66	9336
67	8588
68	4347
69	1530
70	410
71	84
72	13
73	2

[1, 1, 2, 3, 5, 1, 8, 2, 15, 4, 1, 25, 8, 2, 46, 19, 4, 1, 79, 36, 9, 2, 147, 76, 24, 4, 1, 256, 146, 48, 10, 2, 477, 304, 109, 29, 4, 1, 841, 578, 224, 60, 11, 2, 1570, 1180, 499, 144, 34, 4, 1, 2791, 2244, 1002, 312, 72, 12, 2, 5217, 4525, 2172, 731, 181, 39, 4, 1, 9336, 8588, 4347, 1530, 410, 84, 13, 2]

cp's OEIS Frontend

A191791 Triangle read by rows: T(n,k) is the number of length n left factors of Dyck paths having k UDUD's, where U=(1,1) and D=(1,-1).

Table of values

List of values