A059231 - cp's OEIS frontend

A059231 Number of different lattice paths running from (0,0) to (n,0) using steps from S = {(k,k) or (k,-k): k positive integer} that never go below the x-axis.

n	a(n)
0	1
1	1
2	5
3	29
4	185
5	1257
6	8925
7	65445
8	491825
9	3768209
10	29324405
11	231153133
12	1841801065
13	14810069497
14	120029657805
15	979470140661
16	8040831465825
17	66361595715105
18	550284185213925
19	4582462506008253
20	38306388126997785
21	321327658068506121
22	2703925940081270205

[1, 1, 5, 29, 185, 1257, 8925, 65445, 491825, 3768209, 29324405, 231153133, 1841801065, 14810069497, 120029657805, 979470140661, 8040831465825, 66361595715105, 550284185213925, 4582462506008253, 38306388126997785, 321327658068506121, 2703925940081270205]

cp's OEIS Frontend

A059231 Number of different lattice paths running from (0,0) to (n,0) using steps from S = {(k,k) or (k,-k): k positive integer} that never go below the x-axis.

Table of values

List of values