A110190 - cp's OEIS frontend

A110190 Number of (1,0)-steps on the lines y=0 and y=1 in all Schroeder paths of length 2n (a Schroeder path of length 2n is a path from (0,0) to (2n,0), consisting of steps U=(1,1), D=(1,-1) and H=(2,0) and never going below the x-axis).

n	a(n)
0	0
1	1
2	5
3	24
4	116
5	568
6	2820
7	14184
8	72180
9	371112
10	1925380
11	10068728
12	53023860
13	280969560
14	1497072132
15	8016213960
16	43114424308
17	232817773640
18	1261793848836
19	6861179441880
20	37421756333172
21	204671007577464
22	1122275850740996
23	6168352091629864
24	33977333521770996
25	187539324760522728

[0, 1, 5, 24, 116, 568, 2820, 14184, 72180, 371112, 1925380, 10068728, 53023860, 280969560, 1497072132, 8016213960, 43114424308, 232817773640, 1261793848836, 6861179441880, 37421756333172, 204671007577464, 1122275850740996, 6168352091629864, 33977333521770996, 187539324760522728]

cp's OEIS Frontend

A110190 Number of (1,0)-steps on the lines y=0 and y=1 in all Schroeder paths of length 2n (a Schroeder path of length 2n is a path from (0,0) to (2n,0), consisting of steps U=(1,1), D=(1,-1) and H=(2,0) and never going below the x-axis).

Table of values

List of values