A049813 - cp's OEIS frontend

A049813 a(n)=number of Farey fractions of order n that are <=1/9; cf. A049805.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	2
10	3
11	4
12	5
13	6
14	7
15	8
16	9
17	10
18	11
19	13
20	14
21	16
22	17
23	19
24	20
25	22
26	23
27	25
28	27
29	30
30	31
31	34
32	36
33	38
34	40
35	43
36	44
37	48
38	50
39	53
40	55
41	59
42	60
43	64
44	66
45	69
46	72
47	77
48	79
49	84
50	86
51	90
52	93
53	98
54	100
55	105
56	108
57	112
58	115
59	121
60	122

[1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 16, 17, 19, 20, 22, 23, 25, 27, 30, 31, 34, 36, 38, 40, 43, 44, 48, 50, 53, 55, 59, 60, 64, 66, 69, 72, 77, 79, 84, 86, 90, 93, 98, 100, 105, 108, 112, 115, 121, 122]

cp's OEIS Frontend

A049813 a(n)=number of Farey fractions of order n that are <=1/9; cf. A049805.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	2
10	3
11	4
12	5
13	6
14	7
15	8
16	9
17	10
18	11
19	13
20	14
21	16
22	17
23	19
24	20
25	22
26	23
27	25
28	27
29	30
30	31
31	34
32	36
33	38
34	40
35	43
36	44
37	48
38	50
39	53
40	55
41	59
42	60
43	64
44	66
45	69
46	72
47	77
48	79
49	84
50	86
51	90
52	93
53	98
54	100
55	105
56	108
57	112
58	115
59	121
60	122

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	2
10	3
11	4
12	5
13	6
14	7
15	8
16	9
17	10
18	11
19	13
20	14
21	16
22	17
23	19
24	20
25	22
26	23
27	25
28	27
29	30
30	31
31	34
32	36
33	38
34	40
35	43
36	44
37	48
38	50
39	53
40	55
41	59
42	60
43	64
44	66
45	69
46	72
47	77
48	79
49	84
50	86
51	90
52	93
53	98
54	100
55	105
56	108
57	112
58	115
59	121
60	122

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	2
10	3
11	4
12	5
13	6
14	7
15	8
16	9
17	10
18	11
19	13
20	14
21	16
22	17
23	19
24	20
25	22
26	23
27	25
28	27
29	30
30	31
31	34
32	36
33	38
34	40
35	43
36	44
37	48
38	50
39	53
40	55
41	59
42	60
43	64
44	66
45	69
46	72
47	77
48	79
49	84
50	86
51	90
52	93
53	98
54	100
55	105
56	108
57	112
58	115
59	121
60	122