A057432 - cp's OEIS frontend

A057432 Obtained by reading first the numerator then the denominator of fractions in left-hand half of Stern-Brocot tree (A007305/A007306).

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

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

cp's OEIS Frontend

A057432 Obtained by reading first the numerator then the denominator of fractions in left-hand half of Stern-Brocot tree (A007305/A007306).

Table of values

List of values

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

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

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