A050294 - cp's OEIS frontend

A050294 Maximum cardinality of a 3-fold-free subset of {1, 2, ..., n}.

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

[1, 2, 2, 3, 4, 4, 5, 6, 7, 8, 9, 9, 10, 11, 11, 12, 13, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 22, 23, 24, 24, 25, 26, 27, 28, 29, 29, 30, 31, 31, 32, 33, 34, 35, 36, 36, 37, 38, 38, 39, 40, 40, 41, 42, 42, 43, 44, 44, 45, 46, 47, 48, 49, 49, 50, 51, 51, 52, 53, 54, 55]

cp's OEIS Frontend

A050294 Maximum cardinality of a 3-fold-free subset of {1, 2, ..., n}.

Table of values

List of values

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

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

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