A259974 - cp's OEIS frontend

A259974 Irregular triangle read by rows: T(n,k) = number of meanders with n bridges in which the first bridge is bridge k.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	3
8	2
9	3
10	8
11	3
12	3
13	14
14	7
15	7
16	14
17	42
18	14
19	11
20	14
21	81
22	36
23	28
24	36
25	81
26	262
27	81
28	57
29	57
30	81
31	538
32	221
33	155
34	155
35	221
36	538
37	1828
38	538
39	353
40	316
41	353
42	538
43	3926
44	1530
45	1003
46	902
47	1003
48	1530
49	3926
50	13820
51	3926
52	2458
53	2053
54	2053
55	2458
56	3926
57	30694
58	11510
59	7214
60	6059
61	6059
62	7214
63	11510
64	30694
65	110954
66	30694
67	18575
68	14810
69	13827
70	14810
71	18575
72	30694

[1, 1, 1, 1, 2, 1, 3, 2, 3, 8, 3, 3, 14, 7, 7, 14, 42, 14, 11, 14, 81, 36, 28, 36, 81, 262, 81, 57, 57, 81, 538, 221, 155, 155, 221, 538, 1828, 538, 353, 316, 353, 538, 3926, 1530, 1003, 902, 1003, 1530, 3926, 13820, 3926, 2458, 2053, 2053, 2458, 3926, 30694, 11510, 7214, 6059, 6059, 7214, 11510, 30694, 110954, 30694, 18575, 14810, 13827, 14810, 18575, 30694]

cp's OEIS Frontend

A259974 Irregular triangle read by rows: T(n,k) = number of meanders with n bridges in which the first bridge is bridge k.

Table of values

List of values