A336600 - cp's OEIS frontend

A336600 Triangle read by rows: T(n,k) is the number of linear chord diagrams on 2n vertices with one marked chord such that exactly k of the remaining n-1 chords contain the marked chord.

n	a(n)
1	1
2	5
3	1
4	32
5	11
6	2
7	260
8	116
9	38
10	6
11	2589
12	1344
13	594
14	174
15	24
16	30669
17	17529
18	9294
19	3774
20	984
21	120
22	422232
23	257487
24	153852
25	76782
26	28272
27	6600
28	720
29	6633360
30	4234320
31	2746260
32	1576980
33	726480
34	242640
35	51120
36	5040
37	117193185
38	77358600
39	53170380
40	33718500
41	18171360
42	7693200
43	2340720
44	448560
45	40320

[1, 5, 1, 32, 11, 2, 260, 116, 38, 6, 2589, 1344, 594, 174, 24, 30669, 17529, 9294, 3774, 984, 120, 422232, 257487, 153852, 76782, 28272, 6600, 720, 6633360, 4234320, 2746260, 1576980, 726480, 242640, 51120, 5040, 117193185, 77358600, 53170380, 33718500, 18171360, 7693200, 2340720, 448560, 40320]

cp's OEIS Frontend

A336600 Triangle read by rows: T(n,k) is the number of linear chord diagrams on 2n vertices with one marked chord such that exactly k of the remaining n-1 chords contain the marked chord.

Table of values

List of values