A049805 - cp's OEIS frontend

A049805 Triangular array T read by rows: T(n,k) is the number of Farey fractions of order n that are <= 1/k for k=1..n, for n>=1.

n	a(n)
1	2
2	3
3	2
4	5
5	3
6	2
7	7
8	4
9	3
10	2
11	11
12	6
13	4
14	3
15	2
16	13
17	7
18	5
19	4
20	3
21	2
22	19
23	10
24	7
25	5
26	4
27	3
28	2
29	23
30	12
31	8
32	6
33	5
34	4
35	3
36	2
37	29
38	15
39	10
40	8
41	6
42	5
43	4
44	3
45	2
46	33
47	17
48	12
49	9
50	7
51	6
52	5
53	4
54	3
55	2
56	43
57	22
58	15
59	11
60	9
61	7
62	6
63	5
64	4
65	3
66	2
67	47
68	24
69	16
70	12
71	10
72	8
73	7
74	6
75	5
76	4
77	3
78	2

[2, 3, 2, 5, 3, 2, 7, 4, 3, 2, 11, 6, 4, 3, 2, 13, 7, 5, 4, 3, 2, 19, 10, 7, 5, 4, 3, 2, 23, 12, 8, 6, 5, 4, 3, 2, 29, 15, 10, 8, 6, 5, 4, 3, 2, 33, 17, 12, 9, 7, 6, 5, 4, 3, 2, 43, 22, 15, 11, 9, 7, 6, 5, 4, 3, 2, 47, 24, 16, 12, 10, 8, 7, 6, 5, 4, 3, 2]

cp's OEIS Frontend

A049805 Triangular array T read by rows: T(n,k) is the number of Farey fractions of order n that are <= 1/k for k=1..n, for n>=1.

Table of values

List of values

n	a(n)
1	2
2	3
3	2
4	5
5	3
6	2
7	7
8	4
9	3
10	2
11	11
12	6
13	4
14	3
15	2
16	13
17	7
18	5
19	4
20	3
21	2
22	19
23	10
24	7
25	5
26	4
27	3
28	2
29	23
30	12
31	8
32	6
33	5
34	4
35	3
36	2
37	29
38	15
39	10
40	8
41	6
42	5
43	4
44	3
45	2
46	33
47	17
48	12
49	9
50	7
51	6
52	5
53	4
54	3
55	2
56	43
57	22
58	15
59	11
60	9
61	7
62	6
63	5
64	4
65	3
66	2
67	47
68	24
69	16
70	12
71	10
72	8
73	7
74	6
75	5
76	4
77	3
78	2

n	a(n)
1	2
2	3
3	2
4	5
5	3
6	2
7	7
8	4
9	3
10	2
11	11
12	6
13	4
14	3
15	2
16	13
17	7
18	5
19	4
20	3
21	2
22	19
23	10
24	7
25	5
26	4
27	3
28	2
29	23
30	12
31	8
32	6
33	5
34	4
35	3
36	2
37	29
38	15
39	10
40	8
41	6
42	5
43	4
44	3
45	2
46	33
47	17
48	12
49	9
50	7
51	6
52	5
53	4
54	3
55	2
56	43
57	22
58	15
59	11
60	9
61	7
62	6
63	5
64	4
65	3
66	2
67	47
68	24
69	16
70	12
71	10
72	8
73	7
74	6
75	5
76	4
77	3
78	2

n	a(n)
1	2
2	3
3	2
4	5
5	3
6	2
7	7
8	4
9	3
10	2
11	11
12	6
13	4
14	3
15	2
16	13
17	7
18	5
19	4
20	3
21	2
22	19
23	10
24	7
25	5
26	4
27	3
28	2
29	23
30	12
31	8
32	6
33	5
34	4
35	3
36	2
37	29
38	15
39	10
40	8
41	6
42	5
43	4
44	3
45	2
46	33
47	17
48	12
49	9
50	7
51	6
52	5
53	4
54	3
55	2
56	43
57	22
58	15
59	11
60	9
61	7
62	6
63	5
64	4
65	3
66	2
67	47
68	24
69	16
70	12
71	10
72	8
73	7
74	6
75	5
76	4
77	3
78	2