A278398 - cp's OEIS frontend

A278398 Number of meanders (walks starting at the origin and ending at any altitude >= 0 that may touch but never go below the x-axis) with n steps from {-3,-2,-1,1,2,3}.

n	a(n)
0	1
1	3
2	15
3	75
4	400
5	2169
6	11989
7	66985
8	377718
9	2144290
10	12240943
11	70193305
12	404029950
13	2332989921
14	13508237399
15	78399357623
16	455959701700
17	2656652705422
18	15504203678738
19	90614205677898
20	530288460288008
21	3107012752773125
22	18223934202102463
23	106996319699099591

[1, 3, 15, 75, 400, 2169, 11989, 66985, 377718, 2144290, 12240943, 70193305, 404029950, 2332989921, 13508237399, 78399357623, 455959701700, 2656652705422, 15504203678738, 90614205677898, 530288460288008, 3107012752773125, 18223934202102463, 106996319699099591]

cp's OEIS Frontend

A278398 Number of meanders (walks starting at the origin and ending at any altitude >= 0 that may touch but never go below the x-axis) with n steps from {-3,-2,-1,1,2,3}.

Table of values

List of values