A258746 - cp's OEIS frontend

A258746 Permutation of the positive integers: this permutation transforms the enumeration system of positive irreducible fractions A007305/A047679 (Stern-Brocot) into the enumeration system A162909/A162910 (Bird), and vice versa.

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	6
8	10
9	11
10	8
11	9
12	14
13	15
14	12
15	13
16	21
17	20
18	23
19	22
20	17
21	16
22	19
23	18
24	29
25	28
26	31
27	30
28	25
29	24
30	27
31	26
32	42
33	43
34	40
35	41
36	46
37	47
38	44
39	45
40	34
41	35
42	32
43	33
44	38
45	39
46	36
47	37
48	58
49	59
50	56
51	57
52	62

[1, 2, 3, 5, 4, 7, 6, 10, 11, 8, 9, 14, 15, 12, 13, 21, 20, 23, 22, 17, 16, 19, 18, 29, 28, 31, 30, 25, 24, 27, 26, 42, 43, 40, 41, 46, 47, 44, 45, 34, 35, 32, 33, 38, 39, 36, 37, 58, 59, 56, 57, 62]

cp's OEIS Frontend

A258746 Permutation of the positive integers: this permutation transforms the enumeration system of positive irreducible fractions A007305/A047679 (Stern-Brocot) into the enumeration system A162909/A162910 (Bird), and vice versa.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	6
8	10
9	11
10	8
11	9
12	14
13	15
14	12
15	13
16	21
17	20
18	23
19	22
20	17
21	16
22	19
23	18
24	29
25	28
26	31
27	30
28	25
29	24
30	27
31	26
32	42
33	43
34	40
35	41
36	46
37	47
38	44
39	45
40	34
41	35
42	32
43	33
44	38
45	39
46	36
47	37
48	58
49	59
50	56
51	57
52	62

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	6
8	10
9	11
10	8
11	9
12	14
13	15
14	12
15	13
16	21
17	20
18	23
19	22
20	17
21	16
22	19
23	18
24	29
25	28
26	31
27	30
28	25
29	24
30	27
31	26
32	42
33	43
34	40
35	41
36	46
37	47
38	44
39	45
40	34
41	35
42	32
43	33
44	38
45	39
46	36
47	37
48	58
49	59
50	56
51	57
52	62

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	6
8	10
9	11
10	8
11	9
12	14
13	15
14	12
15	13
16	21
17	20
18	23
19	22
20	17
21	16
22	19
23	18
24	29
25	28
26	31
27	30
28	25
29	24
30	27
31	26
32	42
33	43
34	40
35	41
36	46
37	47
38	44
39	45
40	34
41	35
42	32
43	33
44	38
45	39
46	36
47	37
48	58
49	59
50	56
51	57
52	62