A208746 - cp's OEIS frontend

A208746 Size of largest subset of [1..n] containing no three terms in geometric progression.

n	a(n)
1	1
2	2
3	3
4	3
5	4
6	5
7	6
8	7
9	7
10	8
11	9
12	10
13	11
14	12
15	13
16	13
17	14
18	14
19	15
20	15
21	16
22	17
23	18
24	19
25	19
26	20
27	21
28	21
29	22
30	23
31	24
32	24
33	25
34	26
35	27
36	27
37	28
38	29
39	30
40	31
41	32
42	33
43	34
44	34
45	35
46	36
47	37
48	38
49	38
50	38
51	39
52	39
53	40
54	41
55	42
56	43
57	44
58	45
59	46
60	46
61	47
62	48
63	49
64	49
65	50
66	51
67	52
68	52
69	53
70	54
71	55
72	55
73	56
74	57
75	57
76	57
77	58
78	59
79	60
80	61
81	61
82	62
83	63
84	64
85	65
86	66
87	67
88	68
89	69
90	70
91	71
92	71
93	72
94	73
95	74
96	74
97	75
98	75
99	75
100	75

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

cp's OEIS Frontend

A208746 Size of largest subset of [1..n] containing no three terms in geometric progression.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	3
5	4
6	5
7	6
8	7
9	7
10	8
11	9
12	10
13	11
14	12
15	13
16	13
17	14
18	14
19	15
20	15
21	16
22	17
23	18
24	19
25	19
26	20
27	21
28	21
29	22
30	23
31	24
32	24
33	25
34	26
35	27
36	27
37	28
38	29
39	30
40	31
41	32
42	33
43	34
44	34
45	35
46	36
47	37
48	38
49	38
50	38
51	39
52	39
53	40
54	41
55	42
56	43
57	44
58	45
59	46
60	46
61	47
62	48
63	49
64	49
65	50
66	51
67	52
68	52
69	53
70	54
71	55
72	55
73	56
74	57
75	57
76	57
77	58
78	59
79	60
80	61
81	61
82	62
83	63
84	64
85	65
86	66
87	67
88	68
89	69
90	70
91	71
92	71
93	72
94	73
95	74
96	74
97	75
98	75
99	75
100	75

n	a(n)
1	1
2	2
3	3
4	3
5	4
6	5
7	6
8	7
9	7
10	8
11	9
12	10
13	11
14	12
15	13
16	13
17	14
18	14
19	15
20	15
21	16
22	17
23	18
24	19
25	19
26	20
27	21
28	21
29	22
30	23
31	24
32	24
33	25
34	26
35	27
36	27
37	28
38	29
39	30
40	31
41	32
42	33
43	34
44	34
45	35
46	36
47	37
48	38
49	38
50	38
51	39
52	39
53	40
54	41
55	42
56	43
57	44
58	45
59	46
60	46
61	47
62	48
63	49
64	49
65	50
66	51
67	52
68	52
69	53
70	54
71	55
72	55
73	56
74	57
75	57
76	57
77	58
78	59
79	60
80	61
81	61
82	62
83	63
84	64
85	65
86	66
87	67
88	68
89	69
90	70
91	71
92	71
93	72
94	73
95	74
96	74
97	75
98	75
99	75
100	75

n	a(n)
1	1
2	2
3	3
4	3
5	4
6	5
7	6
8	7
9	7
10	8
11	9
12	10
13	11
14	12
15	13
16	13
17	14
18	14
19	15
20	15
21	16
22	17
23	18
24	19
25	19
26	20
27	21
28	21
29	22
30	23
31	24
32	24
33	25
34	26
35	27
36	27
37	28
38	29
39	30
40	31
41	32
42	33
43	34
44	34
45	35
46	36
47	37
48	38
49	38
50	38
51	39
52	39
53	40
54	41
55	42
56	43
57	44
58	45
59	46
60	46
61	47
62	48
63	49
64	49
65	50
66	51
67	52
68	52
69	53
70	54
71	55
72	55
73	56
74	57
75	57
76	57
77	58
78	59
79	60
80	61
81	61
82	62
83	63
84	64
85	65
86	66
87	67
88	68
89	69
90	70
91	71
92	71
93	72
94	73
95	74
96	74
97	75
98	75
99	75
100	75