A187259 - cp's OEIS frontend

A187259 Number of UH^jU's, DH^jD's, and DH^jU's for some j>0, in all peakless Motzkin paths of length n (here U=(1,1), D=(1,-1) and H=(1,0); 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	2
7	11
8	39
9	122
10	358
11	1008
12	2770
13	7493
14	20049
15	53239
16	140603
17	369837
18	969883
19	2537685
20	6628215
21	17288950
22	45048932
23	117285552
24	305159262
25	793581817
26	2062948149
27	5361112383
28	13929080271
29	36183941553
30	93984332531
31	244094334682
32	633922350198
33	1646271999611

[0, 0, 0, 0, 0, 0, 2, 11, 39, 122, 358, 1008, 2770, 7493, 20049, 53239, 140603, 369837, 969883, 2537685, 6628215, 17288950, 45048932, 117285552, 305159262, 793581817, 2062948149, 5361112383, 13929080271, 36183941553, 93984332531, 244094334682, 633922350198, 1646271999611]

cp's OEIS Frontend

A187259 Number of UH^jU's, DH^jD's, and DH^jU's for some j>0, in all peakless Motzkin paths of length n (here U=(1,1), D=(1,-1) and H=(1,0); can be easily expressed using RNA secondary structure terminology).

Table of values

List of values