A153161 - cp's OEIS frontend

A153161 Numerators of Stern-Brocot tree hanging between 1/3 and 2/3; denominators=A153162.

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

[1, 2, 3, 3, 3, 4, 5, 4, 5, 5, 4, 5, 7, 8, 7, 5, 7, 8, 7, 7, 8, 7, 5, 6, 9, 11, 10, 11, 13, 12, 9, 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, 7, 11, 14, 13, 15, 18, 17, 13, 14, 19, 21, 18, 17, 19, 16, 11, 11, 16, 19]

cp's OEIS Frontend

A153161 Numerators of Stern-Brocot tree hanging between 1/3 and 2/3; denominators=A153162.

Table of values

List of values

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

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

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