A286427 - cp's OEIS frontend

A286427 Total number of nodes summed over all lattice paths from (0,0) to (n,0) that do not go below the x-axis or above the diagonal x=y and consist of steps U=(1,1), D=(1,-1) and S=(0,1).

n	a(n)
0	1
1	0
2	3
3	5
4	24
5	78
6	325
7	1272
8	5373
9	22572
10	97762
11	425716
12	1882062
13	8375064
14	37601643
15	169773435
16	771096972
17	3518065767
18	16119884297
19	74125225732
20	341970676466
21	1582133854847
22	7338641255894
23	34117910537671
24	158946919835352
25	741884929970516
26	3468677541274922

[1, 0, 3, 5, 24, 78, 325, 1272, 5373, 22572, 97762, 425716, 1882062, 8375064, 37601643, 169773435, 771096972, 3518065767, 16119884297, 74125225732, 341970676466, 1582133854847, 7338641255894, 34117910537671, 158946919835352, 741884929970516, 3468677541274922]

cp's OEIS Frontend

A286427 Total number of nodes summed over all lattice paths from (0,0) to (n,0) that do not go below the x-axis or above the diagonal x=y and consist of steps U=(1,1), D=(1,-1) and S=(0,1).

Table of values

List of values