A190162 - cp's OEIS frontend

A190162 Number of peakless Motzkin paths of length n containing no subwords of type dh^ju (j>=1), where u=(1,1), h=(1,0), and d=(1,-1) (can be easily expressed using RNA secondary structure terminology).

n	a(n)
0	1
1	1
2	1
3	2
4	4
5	8
6	17
7	36
8	77
9	167
10	365
11	805
12	1790
13	4008
14	9033
15	20477
16	46663
17	106843
18	245691
19	567194
20	1314086
21	3054442
22	7120951
23	16647056
24	39015476
25	91654385
26	215780420
27	509033640
28	1203085539
29	2848445175
30	6755095119
31	16044373511
32	38162885226
33	90897048648

[1, 1, 1, 2, 4, 8, 17, 36, 77, 167, 365, 805, 1790, 4008, 9033, 20477, 46663, 106843, 245691, 567194, 1314086, 3054442, 7120951, 16647056, 39015476, 91654385, 215780420, 509033640, 1203085539, 2848445175, 6755095119, 16044373511, 38162885226, 90897048648]

cp's OEIS Frontend

A190162 Number of peakless Motzkin paths of length n containing no subwords of type dh^ju (j>=1), where u=(1,1), h=(1,0), and d=(1,-1) (can be easily expressed using RNA secondary structure terminology).

Table of values

List of values