A128727 - cp's OEIS frontend

A128727 Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n having k DDU and LDU's.

n	a(n)
0	1
1	1
2	3
3	9
4	1
5	27
6	9
7	81
8	54
9	2
10	243
11	270
12	30
13	729
14	1215
15	270
16	5
17	2187
18	5103
19	1890
20	105
21	6561
22	20412
23	11340
24	1260
25	14
26	19683
27	78732
28	61236
29	11340
30	378
31	59049
32	295245
33	306180
34	85050
35	5670
36	42
37	177147
38	1082565
39	1443420
40	561330
41	62370
42	1386
43	531441

[1, 1, 3, 9, 1, 27, 9, 81, 54, 2, 243, 270, 30, 729, 1215, 270, 5, 2187, 5103, 1890, 105, 6561, 20412, 11340, 1260, 14, 19683, 78732, 61236, 11340, 378, 59049, 295245, 306180, 85050, 5670, 42, 177147, 1082565, 1443420, 561330, 62370, 1386, 531441]

cp's OEIS Frontend

A128727 Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n having k DDU and LDU's.

Table of values

List of values