A007306 - cp's OEIS frontend

A007306 Denominators of Farey tree fractions (i.e., the Stern-Brocot subtree in the range [0,1]).

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

[1, 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, 7, 11, 14, 13, 15, 18, 17, 13, 14, 19, 21, 18, 17, 19, 16, 11, 11, 16, 19, 17, 18, 21, 19, 14, 13, 17, 18, 15, 13, 14, 11, 7, 8, 13, 17, 16, 19, 23, 22, 17, 19, 26, 29, 25, 24]

cp's OEIS Frontend

A007306 Denominators of Farey tree fractions (i.e., the Stern-Brocot subtree in the range [0,1]).

Table of values

List of values

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

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

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