A278394 - cp's OEIS frontend

A278394 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,-1,1,2}.

n	a(n)
0	1
1	2
2	5
3	17
4	58
5	209
6	761
7	2823
8	10557
9	39833
10	151147
11	576564
12	2208163
13	8486987
14	32714813
15	126430229
16	489685674
17	1900350201
18	7387530575
19	28763059410
20	112142791763
21	437774109384
22	1710883748796
23	6693281604018
24	26210038447737
25	102724200946467
26	402925631267151

[1, 2, 5, 17, 58, 209, 761, 2823, 10557, 39833, 151147, 576564, 2208163, 8486987, 32714813, 126430229, 489685674, 1900350201, 7387530575, 28763059410, 112142791763, 437774109384, 1710883748796, 6693281604018, 26210038447737, 102724200946467, 402925631267151]

cp's OEIS Frontend

A278394 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,-1,1,2}.

Table of values

List of values