A308112 - cp's OEIS frontend

A308112 Total number of nodes summed over all lattice paths from (0,0) to (n,n) that consist of steps (h,v) with min(h,v) > 0 and gcd(h,v) = 1.

n	a(n)
0	1
1	2
2	3
3	10
4	47
5	186
6	703
7	2640
8	9979
9	37980
10	144713
11	550666
12	2093215
13	7951524
14	30186737
15	114522342
16	434172249
17	1644889496
18	6227677911
19	23563691408
20	89104756279
21	336752825864
22	1271998719875
23	4802187032270
24	18120902471019
25	68347041380528
26	257673014416775

[1, 2, 3, 10, 47, 186, 703, 2640, 9979, 37980, 144713, 550666, 2093215, 7951524, 30186737, 114522342, 434172249, 1644889496, 6227677911, 23563691408, 89104756279, 336752825864, 1271998719875, 4802187032270, 18120902471019, 68347041380528, 257673014416775]

cp's OEIS Frontend

A308112 Total number of nodes summed over all lattice paths from (0,0) to (n,n) that consist of steps (h,v) with min(h,v) > 0 and gcd(h,v) = 1.

Table of values

List of values