A286764 - cp's OEIS frontend

A286764 Total number of nodes summed over all lattice paths from (0,0) to (n,n) 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	3
2	16
3	109
4	855
5	7298
6	65838
7	617118
8	5946781
9	58506642
10	584894463
11	5921596628
12	60565217546
13	624644829720
14	6487216108058
15	67767838847144
16	711463437534474
17	7501409431304796
18	79386836213817417
19	842882477863610604
20	8974911258934880498
21	95806877080558096428

[1, 3, 16, 109, 855, 7298, 65838, 617118, 5946781, 58506642, 584894463, 5921596628, 60565217546, 624644829720, 6487216108058, 67767838847144, 711463437534474, 7501409431304796, 79386836213817417, 842882477863610604, 8974911258934880498, 95806877080558096428]

cp's OEIS Frontend

A286764 Total number of nodes summed over all lattice paths from (0,0) to (n,n) 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