A277922 - cp's OEIS frontend

A277922 Number of positive walks with n steps {-4,-3,-2,-1,1,2,3,4} starting at the origin, ending at altitude 1, and staying strictly above the x-axis.

n	a(n)
0	0
1	1
2	3
3	13
4	71
5	405
6	2501
7	15923
8	104825
9	704818
10	4827957
11	33549389
12	235990887
13	1676907903
14	12019875907
15	86804930199
16	630999932585
17	4613307289260
18	33900874009698
19	250257489686870
20	1854982039556397
21	13800559463237465
22	103017222722691145
23	771348369563479705

[0, 1, 3, 13, 71, 405, 2501, 15923, 104825, 704818, 4827957, 33549389, 235990887, 1676907903, 12019875907, 86804930199, 630999932585, 4613307289260, 33900874009698, 250257489686870, 1854982039556397, 13800559463237465, 103017222722691145, 771348369563479705]

cp's OEIS Frontend

A277922 Number of positive walks with n steps {-4,-3,-2,-1,1,2,3,4} starting at the origin, ending at altitude 1, and staying strictly above the x-axis.

Table of values

List of values