A286761 - cp's OEIS frontend

A286761 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 D=(1,-1), H=(1,0) and S=(0,1).

n	a(n)
0	1
1	2
2	7
3	25
4	106
5	470
6	2218
7	10799
8	54158
9	277089
10	1441956
11	7602630
12	40524952
13	217954222
14	1181107568
15	6441519814
16	35323986620
17	194629681327
18	1076819450324
19	5979314763974
20	33308210757892
21	186074808452033
22	1042146006514656
23	5850075202736100
24	32907053660222560

[1, 2, 7, 25, 106, 470, 2218, 10799, 54158, 277089, 1441956, 7602630, 40524952, 217954222, 1181107568, 6441519814, 35323986620, 194629681327, 1076819450324, 5979314763974, 33308210757892, 186074808452033, 1042146006514656, 5850075202736100, 32907053660222560]

cp's OEIS Frontend

A286761 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 D=(1,-1), H=(1,0) and S=(0,1).

Table of values

List of values