A110319 - cp's OEIS frontend

A110319 Triangle read by rows: T(n,k) (1 <= k <= n) is number of RNA secondary structures of size n (i.e., with n nodes) having k blocks (an RNA secondary structure can be viewed as a restricted noncrossing partition).

n	a(n)
1	1
2	0
3	1
4	0
5	1
6	1
7	0
8	0
9	3
10	1
11	0
12	0
13	1
14	6
15	1
16	0
17	0
18	0
19	6
20	10
21	1
22	0
23	0
24	0
25	1
26	20
27	15
28	1
29	0
30	0
31	0
32	0
33	10
34	50
35	21
36	1
37	0
38	0
39	0
40	0
41	1
42	50
43	105
44	28
45	1
46	0
47	0
48	0
49	0
50	0
51	15
52	175
53	196
54	36
55	1
56	0
57	0
58	0
59	0
60	0
61	1
62	105
63	490
64	336
65	45
66	1
67	0
68	0
69	0
70	0
71	0
72	0
73	21
74	490
75	1176
76	540
77	55
78	1
79	0
80	0
81	0
82	0
83	0
84	0
85	1
86	196

[1, 0, 1, 0, 1, 1, 0, 0, 3, 1, 0, 0, 1, 6, 1, 0, 0, 0, 6, 10, 1, 0, 0, 0, 1, 20, 15, 1, 0, 0, 0, 0, 10, 50, 21, 1, 0, 0, 0, 0, 1, 50, 105, 28, 1, 0, 0, 0, 0, 0, 15, 175, 196, 36, 1, 0, 0, 0, 0, 0, 1, 105, 490, 336, 45, 1, 0, 0, 0, 0, 0, 0, 21, 490, 1176, 540, 55, 1, 0, 0, 0, 0, 0, 0, 1, 196]

cp's OEIS Frontend

A110319 Triangle read by rows: T(n,k) (1 <= k <= n) is number of RNA secondary structures of size n (i.e., with n nodes) having k blocks (an RNA secondary structure can be viewed as a restricted noncrossing partition).

Table of values

List of values