A293157 - cp's OEIS frontend

A293157 Triangle read by rows: T(n,k) = number of linear chord diagrams with n chords such that every chord has length at least k (1 <= k <= n).

n	a(n)
1	1
2	3
3	1
4	15
5	5
6	1
7	105
8	36
9	10
10	1
11	945
12	329
13	99
14	20
15	1
16	10395
17	3655
18	1146
19	292
20	40
21	1
22	135135
23	47844
24	15422
25	4317
26	876
27	80
28	1
29	2027025
30	721315
31	237135
32	69862
33	16924
34	2628
35	160
36	1
37	34459425
38	12310199
39	4106680
40	1251584
41	332507
42	67404
43	7884
44	320
45	1
46	654729075
47	234615096
48	79154927
49	24728326
50	6944594
51	1627252
52	269616
53	23652
54	640
55	1

[1, 3, 1, 15, 5, 1, 105, 36, 10, 1, 945, 329, 99, 20, 1, 10395, 3655, 1146, 292, 40, 1, 135135, 47844, 15422, 4317, 876, 80, 1, 2027025, 721315, 237135, 69862, 16924, 2628, 160, 1, 34459425, 12310199, 4106680, 1251584, 332507, 67404, 7884, 320, 1, 654729075, 234615096, 79154927, 24728326, 6944594, 1627252, 269616, 23652, 640, 1]

cp's OEIS Frontend

A293157 Triangle read by rows: T(n,k) = number of linear chord diagrams with n chords such that every chord has length at least k (1 <= k <= n).

Table of values

List of values