A218321 - cp's OEIS frontend

A218321 Number of lattice paths from (0,0) to (n,n) which do not go above the diagonal x=y using steps (1,k), (k,1) with k>=0.

n	a(n)
0	1
1	2
2	8
3	39
4	212
5	1230
6	7458
7	46689
8	299463
9	1957723
10	12996879
11	87383754
12	593794311
13	4071599216
14	28136612051
15	195756911831
16	1370068168916
17	9639404836227
18	68138551870047
19	483682445360748
20	3446462104490724
21	24642148415136556
22	176743014104068411

[1, 2, 8, 39, 212, 1230, 7458, 46689, 299463, 1957723, 12996879, 87383754, 593794311, 4071599216, 28136612051, 195756911831, 1370068168916, 9639404836227, 68138551870047, 483682445360748, 3446462104490724, 24642148415136556, 176743014104068411]

cp's OEIS Frontend

A218321 Number of lattice paths from (0,0) to (n,n) which do not go above the diagonal x=y using steps (1,k), (k,1) with k>=0.

Table of values

List of values