A110334 - cp's OEIS frontend

A110334 Number of peakless Motzkin paths of length n having no valleys (i.e., (1,-1) followed by (1,1)) at level zero (can be easily translated into RNA secondary structure terminology).

n	a(n)
0	1
1	1
2	1
3	2
4	4
5	8
6	16
7	33
8	70
9	152
10	336
11	754
12	1714
13	3940
14	9145
15	21406
16	50478
17	119814
18	286045
19	686456
20	1655053
21	4007131
22	9738812
23	23750895
24	58106547
25	142569506
26	350738607
27	864980279
28	2138034715
29	5295877279
30	13143521437
31	32679745904

[1, 1, 1, 2, 4, 8, 16, 33, 70, 152, 336, 754, 1714, 3940, 9145, 21406, 50478, 119814, 286045, 686456, 1655053, 4007131, 9738812, 23750895, 58106547, 142569506, 350738607, 864980279, 2138034715, 5295877279, 13143521437, 32679745904]

cp's OEIS Frontend

A110334 Number of peakless Motzkin paths of length n having no valleys (i.e., (1,-1) followed by (1,1)) at level zero (can be easily translated into RNA secondary structure terminology).

Table of values

List of values