A007305 - cp's OEIS frontend

A007305 Numerators of Farey (or Stern-Brocot) tree fractions.

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	1
6	2
7	3
8	3
9	1
10	2
11	3
12	3
13	4
14	5
15	5
16	4
17	1
18	2
19	3
20	3
21	4
22	5
23	5
24	4
25	5
26	7
27	8
28	7
29	7
30	8
31	7
32	5
33	1
34	2
35	3
36	3
37	4
38	5
39	5
40	4
41	5
42	7
43	8
44	7
45	7
46	8
47	7
48	5
49	6
50	9
51	11
52	10
53	11
54	13
55	12
56	9
57	9
58	12
59	13
60	11
61	10
62	11
63	9
64	6
65	1
66	2
67	3
68	3
69	4
70	5
71	5
72	4
73	5
74	7
75	8
76	7
77	7
78	8
79	7
80	5
81	6
82	9
83	11
84	10
85	11
86	13
87	12
88	9
89	9
90	12
91	13
92	11

[0, 1, 1, 1, 2, 1, 2, 3, 3, 1, 2, 3, 3, 4, 5, 5, 4, 1, 2, 3, 3, 4, 5, 5, 4, 5, 7, 8, 7, 7, 8, 7, 5, 1, 2, 3, 3, 4, 5, 5, 4, 5, 7, 8, 7, 7, 8, 7, 5, 6, 9, 11, 10, 11, 13, 12, 9, 9, 12, 13, 11, 10, 11, 9, 6, 1, 2, 3, 3, 4, 5, 5, 4, 5, 7, 8, 7, 7, 8, 7, 5, 6, 9, 11, 10, 11, 13, 12, 9, 9, 12, 13, 11]

cp's OEIS Frontend

A007305 Numerators of Farey (or Stern-Brocot) tree fractions.

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	1
6	2
7	3
8	3
9	1
10	2
11	3
12	3
13	4
14	5
15	5
16	4
17	1
18	2
19	3
20	3
21	4
22	5
23	5
24	4
25	5
26	7
27	8
28	7
29	7
30	8
31	7
32	5
33	1
34	2
35	3
36	3
37	4
38	5
39	5
40	4
41	5
42	7
43	8
44	7
45	7
46	8
47	7
48	5
49	6
50	9
51	11
52	10
53	11
54	13
55	12
56	9
57	9
58	12
59	13
60	11
61	10
62	11
63	9
64	6
65	1
66	2
67	3
68	3
69	4
70	5
71	5
72	4
73	5
74	7
75	8
76	7
77	7
78	8
79	7
80	5
81	6
82	9
83	11
84	10
85	11
86	13
87	12
88	9
89	9
90	12
91	13
92	11

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	1
6	2
7	3
8	3
9	1
10	2
11	3
12	3
13	4
14	5
15	5
16	4
17	1
18	2
19	3
20	3
21	4
22	5
23	5
24	4
25	5
26	7
27	8
28	7
29	7
30	8
31	7
32	5
33	1
34	2
35	3
36	3
37	4
38	5
39	5
40	4
41	5
42	7
43	8
44	7
45	7
46	8
47	7
48	5
49	6
50	9
51	11
52	10
53	11
54	13
55	12
56	9
57	9
58	12
59	13
60	11
61	10
62	11
63	9
64	6
65	1
66	2
67	3
68	3
69	4
70	5
71	5
72	4
73	5
74	7
75	8
76	7
77	7
78	8
79	7
80	5
81	6
82	9
83	11
84	10
85	11
86	13
87	12
88	9
89	9
90	12
91	13
92	11

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	1
6	2
7	3
8	3
9	1
10	2
11	3
12	3
13	4
14	5
15	5
16	4
17	1
18	2
19	3
20	3
21	4
22	5
23	5
24	4
25	5
26	7
27	8
28	7
29	7
30	8
31	7
32	5
33	1
34	2
35	3
36	3
37	4
38	5
39	5
40	4
41	5
42	7
43	8
44	7
45	7
46	8
47	7
48	5
49	6
50	9
51	11
52	10
53	11
54	13
55	12
56	9
57	9
58	12
59	13
60	11
61	10
62	11
63	9
64	6
65	1
66	2
67	3
68	3
69	4
70	5
71	5
72	4
73	5
74	7
75	8
76	7
77	7
78	8
79	7
80	5
81	6
82	9
83	11
84	10
85	11
86	13
87	12
88	9
89	9
90	12
91	13
92	11