A202843 - cp's OEIS frontend

A202843 Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of length 3.

n	a(n)
0	1
1	1
2	1
3	2
4	4
5	8
6	17
7	36
8	1
9	79
10	3
11	179
12	6
13	407
14	16
15	935
16	43
17	2173
18	110
19	5089
20	284
21	12005
22	727
23	3
24	28500
25	1858
26	14
27	68022
28	4767
29	43
30	163154
31	12210
32	138
33	393060
34	31255
35	433
36	950652
37	80057
38	1295
39	2307454
40	205088
41	3804
42	1
43	5618906
44	525534
45	10985
46	16
47	13723145
48	1347174
49	31297
50	85

[1, 1, 1, 2, 4, 8, 17, 36, 1, 79, 3, 179, 6, 407, 16, 935, 43, 2173, 110, 5089, 284, 12005, 727, 3, 28500, 1858, 14, 68022, 4767, 43, 163154, 12210, 138, 393060, 31255, 433, 950652, 80057, 1295, 2307454, 205088, 3804, 1, 5618906, 525534, 10985, 16, 13723145, 1347174, 31297, 85]

cp's OEIS Frontend

A202843 Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of length 3.

Table of values

List of values