A181833 - cp's OEIS frontend

A181833 The number of positive integers <= n that are not strongly prime to n.

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

[0, 0, 2, 3, 4, 4, 6, 5, 6, 7, 9, 5, 10, 7, 10, 11, 12, 6, 14, 7, 14, 15, 16, 5, 18, 13, 17, 13, 20, 7, 24, 9, 18, 19, 22, 15, 28, 10, 22, 19, 28, 9, 32, 9, 26, 27, 30, 5, 34, 17, 33, 25, 32, 7, 38, 23, 36, 29, 34, 5, 46]

cp's OEIS Frontend

A181833 The number of positive integers <= n that are not strongly prime to n.

Table of values

List of values

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

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

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