A187257 - cp's OEIS frontend

A187257 Number of UH^jU's for some j>0, where U=(1,1) and H=(1,1), in all peakless Motzkin paths of length n (can be easily expressed using RNA secondary structure terminology).

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	1
7	5
8	17
9	52
10	150
11	417
12	1135
13	3047
14	8103
15	21409
16	56303
17	147569
18	385808
19	1006775
20	2623477
21	6828941
22	17761182
23	46165507
24	119937807
25	311485907
26	808731993
27	2099358057
28	5448906369
29	14141429587
30	36699034884
31	95237147804
32	247149109444
33	641388458961

[0, 0, 0, 0, 0, 0, 1, 5, 17, 52, 150, 417, 1135, 3047, 8103, 21409, 56303, 147569, 385808, 1006775, 2623477, 6828941, 17761182, 46165507, 119937807, 311485907, 808731993, 2099358057, 5448906369, 14141429587, 36699034884, 95237147804, 247149109444, 641388458961]

cp's OEIS Frontend

A187257 Number of UH^jU's for some j>0, where U=(1,1) and H=(1,1), in all peakless Motzkin paths of length n (can be easily expressed using RNA secondary structure terminology).

Table of values

List of values