A057860 - cp's OEIS frontend

A057860 Number of residue classes modulo n which contain only composite numbers.

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	2
7	0
8	3
9	2
10	4
11	0
12	6
13	0
14	6
15	5
16	7
17	0
18	10
19	0
20	10
21	7
22	10
23	0
24	14
25	4
26	12
27	8
28	14
29	0
30	19
31	0
32	15
33	11
34	16
35	9
36	22
37	0
38	18
39	13
40	22
41	0
42	27
43	0
44	22
45	19
46	22
47	0
48	30
49	6
50	28
51	17
52	26
53	0
54	34
55	13
56	30
57	19
58	28
59	0
60	41
61	0
62	30
63	25
64	31
65	15
66	43
67	0
68	34
69	23

[0, 0, 0, 1, 0, 2, 0, 3, 2, 4, 0, 6, 0, 6, 5, 7, 0, 10, 0, 10, 7, 10, 0, 14, 4, 12, 8, 14, 0, 19, 0, 15, 11, 16, 9, 22, 0, 18, 13, 22, 0, 27, 0, 22, 19, 22, 0, 30, 6, 28, 17, 26, 0, 34, 13, 30, 19, 28, 0, 41, 0, 30, 25, 31, 15, 43, 0, 34, 23]

cp's OEIS Frontend

A057860 Number of residue classes modulo n which contain only composite numbers.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	2
7	0
8	3
9	2
10	4
11	0
12	6
13	0
14	6
15	5
16	7
17	0
18	10
19	0
20	10
21	7
22	10
23	0
24	14
25	4
26	12
27	8
28	14
29	0
30	19
31	0
32	15
33	11
34	16
35	9
36	22
37	0
38	18
39	13
40	22
41	0
42	27
43	0
44	22
45	19
46	22
47	0
48	30
49	6
50	28
51	17
52	26
53	0
54	34
55	13
56	30
57	19
58	28
59	0
60	41
61	0
62	30
63	25
64	31
65	15
66	43
67	0
68	34
69	23

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	2
7	0
8	3
9	2
10	4
11	0
12	6
13	0
14	6
15	5
16	7
17	0
18	10
19	0
20	10
21	7
22	10
23	0
24	14
25	4
26	12
27	8
28	14
29	0
30	19
31	0
32	15
33	11
34	16
35	9
36	22
37	0
38	18
39	13
40	22
41	0
42	27
43	0
44	22
45	19
46	22
47	0
48	30
49	6
50	28
51	17
52	26
53	0
54	34
55	13
56	30
57	19
58	28
59	0
60	41
61	0
62	30
63	25
64	31
65	15
66	43
67	0
68	34
69	23

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	2
7	0
8	3
9	2
10	4
11	0
12	6
13	0
14	6
15	5
16	7
17	0
18	10
19	0
20	10
21	7
22	10
23	0
24	14
25	4
26	12
27	8
28	14
29	0
30	19
31	0
32	15
33	11
34	16
35	9
36	22
37	0
38	18
39	13
40	22
41	0
42	27
43	0
44	22
45	19
46	22
47	0
48	30
49	6
50	28
51	17
52	26
53	0
54	34
55	13
56	30
57	19
58	28
59	0
60	41
61	0
62	30
63	25
64	31
65	15
66	43
67	0
68	34
69	23