A266405 - cp's OEIS frontend

A266405 Start with a(1) = 1, then always choose for a(n) the least unused number such that A002487(a(n)a(n-1)) = A002487(a(n)) A002487(a(n-1)), where A002487 is Stern-Brocot sequence.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	6
9	9
10	10
11	14
12	16
13	11
14	17
15	13
16	12
17	18
18	15
19	26
20	24
21	23
22	19
23	32
24	20
25	28
26	34
27	22
28	27
29	33
30	29
31	31
32	25
33	45
34	49
35	36
36	30
37	52
38	48
39	35
40	64
41	21
42	69
43	42
44	128
45	37
46	256
47	38
48	46
49	66
50	54
51	41
52	83
53	82
54	108
55	44
56	39
57	88
58	68
59	56
60	40
61	55
62	65
63	47
64	130
65	59
66	96
67	51
68	192
69	70
70	72
71	60
72	104
73	71
74	80
75	57
76	63
77	61
78	126
79	98
80	90
81	50
82	62
83	58
84	124
85	100
86	121
87	127

[1, 2, 3, 4, 5, 7, 8, 6, 9, 10, 14, 16, 11, 17, 13, 12, 18, 15, 26, 24, 23, 19, 32, 20, 28, 34, 22, 27, 33, 29, 31, 25, 45, 49, 36, 30, 52, 48, 35, 64, 21, 69, 42, 128, 37, 256, 38, 46, 66, 54, 41, 83, 82, 108, 44, 39, 88, 68, 56, 40, 55, 65, 47, 130, 59, 96, 51, 192, 70, 72, 60, 104, 71, 80, 57, 63, 61, 126, 98, 90, 50, 62, 58, 124, 100, 121, 127]

cp's OEIS Frontend

A266405 Start with a(1) = 1, then always choose for a(n) the least unused number such that A002487(a(n)a(n-1)) = A002487(a(n)) A002487(a(n-1)), where A002487 is Stern-Brocot sequence.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	6
9	9
10	10
11	14
12	16
13	11
14	17
15	13
16	12
17	18
18	15
19	26
20	24
21	23
22	19
23	32
24	20
25	28
26	34
27	22
28	27
29	33
30	29
31	31
32	25
33	45
34	49
35	36
36	30
37	52
38	48
39	35
40	64
41	21
42	69
43	42
44	128
45	37
46	256
47	38
48	46
49	66
50	54
51	41
52	83
53	82
54	108
55	44
56	39
57	88
58	68
59	56
60	40
61	55
62	65
63	47
64	130
65	59
66	96
67	51
68	192
69	70
70	72
71	60
72	104
73	71
74	80
75	57
76	63
77	61
78	126
79	98
80	90
81	50
82	62
83	58
84	124
85	100
86	121
87	127

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	6
9	9
10	10
11	14
12	16
13	11
14	17
15	13
16	12
17	18
18	15
19	26
20	24
21	23
22	19
23	32
24	20
25	28
26	34
27	22
28	27
29	33
30	29
31	31
32	25
33	45
34	49
35	36
36	30
37	52
38	48
39	35
40	64
41	21
42	69
43	42
44	128
45	37
46	256
47	38
48	46
49	66
50	54
51	41
52	83
53	82
54	108
55	44
56	39
57	88
58	68
59	56
60	40
61	55
62	65
63	47
64	130
65	59
66	96
67	51
68	192
69	70
70	72
71	60
72	104
73	71
74	80
75	57
76	63
77	61
78	126
79	98
80	90
81	50
82	62
83	58
84	124
85	100
86	121
87	127

cp's OEIS Frontend

A266405 Start with a(1) = 1, then always choose for a(n) the least unused number such that A002487(a(n)*a(n-1)) = A002487(a(n)) * A002487(a(n-1)), where A002487 is Stern-Brocot sequence.

Table of values

List of values

A266405 Start with a(1) = 1, then always choose for a(n) the least unused number such that A002487(a(n)a(n-1)) = A002487(a(n)) A002487(a(n-1)), where A002487 is Stern-Brocot sequence.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	6
9	9
10	10
11	14
12	16
13	11
14	17
15	13
16	12
17	18
18	15
19	26
20	24
21	23
22	19
23	32
24	20
25	28
26	34
27	22
28	27
29	33
30	29
31	31
32	25
33	45
34	49
35	36
36	30
37	52
38	48
39	35
40	64
41	21
42	69
43	42
44	128
45	37
46	256
47	38
48	46
49	66
50	54
51	41
52	83
53	82
54	108
55	44
56	39
57	88
58	68
59	56
60	40
61	55
62	65
63	47
64	130
65	59
66	96
67	51
68	192
69	70
70	72
71	60
72	104
73	71
74	80
75	57
76	63
77	61
78	126
79	98
80	90
81	50
82	62
83	58
84	124
85	100
86	121
87	127