A338006 - cp's OEIS frontend

A338006 Maximal size of a subset of {1..n} such that every pair of (not necessarily distinct) elements has a different product.

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

[1, 2, 3, 3, 4, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 13, 13, 14, 14, 15, 15, 15, 16, 17, 17, 18, 18, 19, 19, 19, 19, 20, 20, 20, 21, 22, 23, 24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 31, 31, 31, 31, 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 36, 36, 37, 37, 37, 37, 38]

cp's OEIS Frontend

A338006 Maximal size of a subset of {1..n} such that every pair of (not necessarily distinct) elements has a different product.

Table of values

List of values

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

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

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