A308113 - cp's OEIS frontend

A308113 Number of lattice paths from (0,0) to (n,n) that do not go above the diagonal x=y and consist of steps (h,v) with min(h,v) > 0 and gcd(h,v) = 1.

n	a(n)
0	1
1	1
2	1
3	2
4	7
5	22
6	68
7	205
8	634
9	2011
10	6490
11	21178
12	69785
13	231940
14	776794
15	2618951
16	8881373
17	30274185
18	103673227
19	356500914
20	1230497234
21	4261633997
22	14805279769
23	51580807121
24	180173390369
25	630864082719
26	2213834486422
27	7784823272163
28	27427361186479

[1, 1, 1, 2, 7, 22, 68, 205, 634, 2011, 6490, 21178, 69785, 231940, 776794, 2618951, 8881373, 30274185, 103673227, 356500914, 1230497234, 4261633997, 14805279769, 51580807121, 180173390369, 630864082719, 2213834486422, 7784823272163, 27427361186479]

cp's OEIS Frontend

A308113 Number of lattice paths from (0,0) to (n,n) that do not go above the diagonal x=y and consist of steps (h,v) with min(h,v) > 0 and gcd(h,v) = 1.

Table of values

List of values