A187253 - cp's OEIS frontend

A187253 Triangle read by rows: T(n,k) is the number of 3-noncrossing RNA structures on n vertices having k isolated vertices.

n	a(n)
0	1
1	0
2	1
3	0
4	0
5	1
6	0
7	1
8	0
9	1
10	1
11	0
12	3
13	0
14	1
15	0
16	6
17	0
18	6
19	0
20	1
21	4
22	0
23	21
24	0
25	10
26	0
27	1
28	0
29	34
30	0
31	55
32	0
33	15
34	0
35	1
36	22
37	0
38	157
39	0
40	120
41	0
42	21
43	0
44	1
45	0
46	232
47	0
48	526
49	0
50	231
51	0
52	28
53	0
54	1
55	139
56	0
57	1317
58	0
59	1435
60	0
61	406
62	0
63	36
64	0
65	1
66	0
67	1761
68	0
69	5355
70	0
71	3388
72	0
73	666
74	0
75	45
76	0
77	1
78	979
79	0
80	11883
81	0
82	17500
83	0
84	7182
85	0
86	1035
87	0
88	55
89	0
90	1

[1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 3, 0, 1, 0, 6, 0, 6, 0, 1, 4, 0, 21, 0, 10, 0, 1, 0, 34, 0, 55, 0, 15, 0, 1, 22, 0, 157, 0, 120, 0, 21, 0, 1, 0, 232, 0, 526, 0, 231, 0, 28, 0, 1, 139, 0, 1317, 0, 1435, 0, 406, 0, 36, 0, 1, 0, 1761, 0, 5355, 0, 3388, 0, 666, 0, 45, 0, 1, 979, 0, 11883, 0, 17500, 0, 7182, 0, 1035, 0, 55, 0, 1]

cp's OEIS Frontend

A187253 Triangle read by rows: T(n,k) is the number of 3-noncrossing RNA structures on n vertices having k isolated vertices.

Table of values

List of values