A232223 - cp's OEIS frontend

A232223 Triangle read by rows: T(n,k) = number of connected matchings with n crossings and k chords, in a disk, k=2..n+1.

n	a(n)
1	1
2	0
3	3
4	0
5	1
6	12
7	0
8	0
9	10
10	55
11	0
12	0
13	4
14	77
15	273
16	0
17	0
18	1
19	60
20	546
21	1428
22	0
23	0
24	0
25	35
26	624
27	3740
28	7752
29	0
30	0
31	0
32	15
33	546
34	5600
35	25194
36	43263
37	0
38	0
39	0
40	5
41	391
42	6405
43	46512
44	168245
45	246675
46	0
47	0
48	0
49	1
50	240
51	6125
52	65076
53	368676
54	1118260
55	1430715
56	0
57	0
58	0
59	0
60	126
61	5138
62	76296
63	606879
64	2833600
65	7413705
66	8414640
67	0
68	0
69	0
70	0
71	56
72	3857
73	78880
74	834195
75	5348420
76	21312720
77	49085400
78	50067108

[1, 0, 3, 0, 1, 12, 0, 0, 10, 55, 0, 0, 4, 77, 273, 0, 0, 1, 60, 546, 1428, 0, 0, 0, 35, 624, 3740, 7752, 0, 0, 0, 15, 546, 5600, 25194, 43263, 0, 0, 0, 5, 391, 6405, 46512, 168245, 246675, 0, 0, 0, 1, 240, 6125, 65076, 368676, 1118260, 1430715, 0, 0, 0, 0, 126, 5138, 76296, 606879, 2833600, 7413705, 8414640, 0, 0, 0, 0, 56, 3857, 78880, 834195, 5348420, 21312720, 49085400, 50067108]

cp's OEIS Frontend

A232223 Triangle read by rows: T(n,k) = number of connected matchings with n crossings and k chords, in a disk, k=2..n+1.

Table of values

List of values