A194595 - cp's OEIS frontend

A194595 Triangle by rows T(n,k), showing the number of meanders with length (n+1)3 and containing (k+1)3 L's and (n-k)*3 R's, where L's and R's denote arcs of equal length and a central angle of 120 degrees which are positively or negatively oriented.

n	a(n)
0	1
1	3
2	1
3	7
4	14
5	1
6	13
7	81
8	39
9	1
10	21
11	304
12	456
13	84
14	1
15	31
16	875
17	3000
18	1750
19	155
20	1
21	43
22	2106
23	13875
24	18500
25	5265
26	258
27	1
28	57
29	4459
30	50421
31	128625
32	84035
33	13377
34	399
35	1
36	73
37	8576
38	153664
39	669536
40	836920
41	307328
42	30016
43	584
44	1
45	91
46	15309
47	409536
48	2815344
49	6001128
50	4223016
51	955584
52	61236
53	819
54	1

[1, 3, 1, 7, 14, 1, 13, 81, 39, 1, 21, 304, 456, 84, 1, 31, 875, 3000, 1750, 155, 1, 43, 2106, 13875, 18500, 5265, 258, 1, 57, 4459, 50421, 128625, 84035, 13377, 399, 1, 73, 8576, 153664, 669536, 836920, 307328, 30016, 584, 1, 91, 15309, 409536, 2815344, 6001128, 4223016, 955584, 61236, 819, 1]

cp's OEIS Frontend

A194595 Triangle by rows T(n,k), showing the number of meanders with length (n+1)3 and containing (k+1)3 L's and (n-k)*3 R's, where L's and R's denote arcs of equal length and a central angle of 120 degrees which are positively or negatively oriented.

Table of values

List of values

cp's OEIS Frontend

A194595 Triangle by rows T(n,k), showing the number of meanders with length (n+1)*3 and containing (k+1)*3 L's and (n-k)*3 R's, where L's and R's denote arcs of equal length and a central angle of 120 degrees which are positively or negatively oriented.

Table of values

List of values

A194595 Triangle by rows T(n,k), showing the number of meanders with length (n+1)3 and containing (k+1)3 L's and (n-k)*3 R's, where L's and R's denote arcs of equal length and a central angle of 120 degrees which are positively or negatively oriented.