A278391 - cp's OEIS frontend

A278391 Number of positive meanders (walks starting at the origin and ending at any altitude > 0 that never touch or go below the x-axis in between) with n steps from {-2,-1,0,1,2}.

n	a(n)
0	1
1	2
2	7
3	29
4	126
5	565
6	2583
7	11971
8	56038
9	264345
10	1254579
11	5983628
12	28655047
13	137697549
14	663621741
15	3206344672
16	15525816066
17	75324830665
18	366071485943
19	1781794374016
20	8684511754535
21	42381025041490
22	207055067487165
23	1012617403658500
24	4956924278927910

[1, 2, 7, 29, 126, 565, 2583, 11971, 56038, 264345, 1254579, 5983628, 28655047, 137697549, 663621741, 3206344672, 15525816066, 75324830665, 366071485943, 1781794374016, 8684511754535, 42381025041490, 207055067487165, 1012617403658500, 4956924278927910]

cp's OEIS Frontend

A278391 Number of positive meanders (walks starting at the origin and ending at any altitude > 0 that never touch or go below the x-axis in between) with n steps from {-2,-1,0,1,2}.

Table of values

List of values