A187260 - cp's OEIS frontend

A187260 Number of uh^jd's for some j>0, starting at level 0, 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	1
4	3
5	6
6	12
7	25
8	53
9	115
10	255
11	575
12	1315
13	3043
14	7111
15	16756
16	39766
17	94961
18	228003
19	550081
20	1332839
21	3241930
22	7913028
23	19375635
24	47579847
25	117149125
26	289142441
27	715253644
28	1773011502
29	4403539181
30	10956537307
31	27307002454
32	68164324150
33	170404155586
34	426584025250
35	1069289177950

[0, 0, 0, 1, 3, 6, 12, 25, 53, 115, 255, 575, 1315, 3043, 7111, 16756, 39766, 94961, 228003, 550081, 1332839, 3241930, 7913028, 19375635, 47579847, 117149125, 289142441, 715253644, 1773011502, 4403539181, 10956537307, 27307002454, 68164324150, 170404155586, 426584025250, 1069289177950]

cp's OEIS Frontend

A187260 Number of uh^jd's for some j>0, starting at level 0, 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