A369149 - cp's OEIS frontend

A369149 a(n) is the size of the largest subset of {1,...,n} such that no two elements differ by 4 or 7.

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

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

cp's OEIS Frontend

A369149 a(n) is the size of the largest subset of {1,...,n} such that no two elements differ by 4 or 7.

Table of values

List of values

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

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

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