A336601 - cp's OEIS frontend

A336601 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 are excluded by (i.e., are outside and do not contain) the marked chord.

n	a(n)
1	1
2	4
3	2
4	22
5	16
6	7
7	160
8	136
9	88
10	36
11	1464
12	1344
13	1044
14	624
15	249
16	16224
17	15504
18	13344
19	9624
20	5484
21	2190
22	211632
23	206592
24	188952
25	152832
26	104322
27	58080
28	23535
29	3179520
30	3139200
31	2977920
32	2594880
33	1990080
34	1309680
35	725040
36	299880
37	54092160
38	53729280
39	52096320
40	47681280
41	39652560
42	29174400
43	18809640
44	10473120
45	4426065

[1, 4, 2, 22, 16, 7, 160, 136, 88, 36, 1464, 1344, 1044, 624, 249, 16224, 15504, 13344, 9624, 5484, 2190, 211632, 206592, 188952, 152832, 104322, 58080, 23535, 3179520, 3139200, 2977920, 2594880, 1990080, 1309680, 725040, 299880, 54092160, 53729280, 52096320, 47681280, 39652560, 29174400, 18809640, 10473120, 4426065]

cp's OEIS Frontend

A336601 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 are excluded by (i.e., are outside and do not contain) the marked chord.

Table of values

List of values