A197655 - cp's OEIS frontend

A197655 Triangle by rows T(n,k), showing the number of meanders with length (n+1)6 and containing (k+1)6 Ls and (n-k)*6 Rs, where Ls and Rs denote arcs of equal length and a central angle of 60 degrees which are positively or negatively oriented.

n	a(n)
0	1
1	6
2	1
3	63
4	126
5	1
6	364
7	4374
8	1092
9	1
10	1365
11	85120
12	127680
13	5460
14	1
15	3906
16	984375
17	6000000
18	1968750
19	19530
20	1
21	9331
22	7562646
23	157828125
24	210437500
25	18906615
26	55986
27	1
28	19608
29	42824236
30	2628749256
31	11029593750
32	4381248760
33	128472708
34	137256
35	1

[1, 6, 1, 63, 126, 1, 364, 4374, 1092, 1, 1365, 85120, 127680, 5460, 1, 3906, 984375, 6000000, 1968750, 19530, 1, 9331, 7562646, 157828125, 210437500, 18906615, 55986, 1, 19608, 42824236, 2628749256, 11029593750, 4381248760, 128472708, 137256, 1]

cp's OEIS Frontend

A197655 Triangle by rows T(n,k), showing the number of meanders with length (n+1)6 and containing (k+1)6 Ls and (n-k)*6 Rs, where Ls and Rs denote arcs of equal length and a central angle of 60 degrees which are positively or negatively oriented.

Table of values

List of values

cp's OEIS Frontend

A197655 Triangle by rows T(n,k), showing the number of meanders with length (n+1)*6 and containing (k+1)*6 Ls and (n-k)*6 Rs, where Ls and Rs denote arcs of equal length and a central angle of 60 degrees which are positively or negatively oriented.

Table of values

List of values

A197655 Triangle by rows T(n,k), showing the number of meanders with length (n+1)6 and containing (k+1)6 Ls and (n-k)*6 Rs, where Ls and Rs denote arcs of equal length and a central angle of 60 degrees which are positively or negatively oriented.