A190163 - cp's OEIS frontend

A190163 Number of subwords of type dh^ju (j>=1), where u=(1,1), h=(1,0), and d=(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	0
7	1
8	5
9	18
10	58
11	174
12	500
13	1399
14	3843
15	10421
16	27997
17	74699
18	198267
19	524135
20	1381261
21	3631068
22	9526568
23	24954538
24	65283648
25	170610003
26	445484163
27	1162396269
28	3031267533
29	7901082379
30	20586262763
31	53620039074
32	139624131310
33	363495081689
34	946147596489
35	2462387385085

[0, 0, 0, 0, 0, 0, 0, 1, 5, 18, 58, 174, 500, 1399, 3843, 10421, 27997, 74699, 198267, 524135, 1381261, 3631068, 9526568, 24954538, 65283648, 170610003, 445484163, 1162396269, 3031267533, 7901082379, 20586262763, 53620039074, 139624131310, 363495081689, 946147596489, 2462387385085]

cp's OEIS Frontend

A190163 Number of subwords of type dh^ju (j>=1), where u=(1,1), h=(1,0), and d=(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