A228620 - cp's OEIS frontend

A228620 a(n) = n - phi(n) + mu(n).

n	a(n)
1	1
2	0
3	0
4	2
5	0
6	5
7	0
8	4
9	3
10	7
11	0
12	8
13	0
14	9
15	8
16	8
17	0
18	12
19	0
20	12
21	10
22	13
23	0
24	16
25	5
26	15
27	9
28	16
29	0
30	21
31	0
32	16
33	14
34	19
35	12
36	24
37	0
38	21
39	16
40	24
41	0
42	29
43	0
44	24
45	21
46	25
47	0
48	32
49	7
50	30
51	20
52	28
53	0
54	36
55	16
56	32
57	22
58	31
59	0
60	44
61	0
62	33
63	27
64	32
65	18
66	45
67	0
68	36
69	26
70	45
71	0
72	48
73	0

[1, 0, 0, 2, 0, 5, 0, 4, 3, 7, 0, 8, 0, 9, 8, 8, 0, 12, 0, 12, 10, 13, 0, 16, 5, 15, 9, 16, 0, 21, 0, 16, 14, 19, 12, 24, 0, 21, 16, 24, 0, 29, 0, 24, 21, 25, 0, 32, 7, 30, 20, 28, 0, 36, 16, 32, 22, 31, 0, 44, 0, 33, 27, 32, 18, 45, 0, 36, 26, 45, 0, 48, 0]

cp's OEIS Frontend

A228620 a(n) = n - phi(n) + mu(n).

Table of values

List of values

n	a(n)
1	1
2	0
3	0
4	2
5	0
6	5
7	0
8	4
9	3
10	7
11	0
12	8
13	0
14	9
15	8
16	8
17	0
18	12
19	0
20	12
21	10
22	13
23	0
24	16
25	5
26	15
27	9
28	16
29	0
30	21
31	0
32	16
33	14
34	19
35	12
36	24
37	0
38	21
39	16
40	24
41	0
42	29
43	0
44	24
45	21
46	25
47	0
48	32
49	7
50	30
51	20
52	28
53	0
54	36
55	16
56	32
57	22
58	31
59	0
60	44
61	0
62	33
63	27
64	32
65	18
66	45
67	0
68	36
69	26
70	45
71	0
72	48
73	0

n	a(n)
1	1
2	0
3	0
4	2
5	0
6	5
7	0
8	4
9	3
10	7
11	0
12	8
13	0
14	9
15	8
16	8
17	0
18	12
19	0
20	12
21	10
22	13
23	0
24	16
25	5
26	15
27	9
28	16
29	0
30	21
31	0
32	16
33	14
34	19
35	12
36	24
37	0
38	21
39	16
40	24
41	0
42	29
43	0
44	24
45	21
46	25
47	0
48	32
49	7
50	30
51	20
52	28
53	0
54	36
55	16
56	32
57	22
58	31
59	0
60	44
61	0
62	33
63	27
64	32
65	18
66	45
67	0
68	36
69	26
70	45
71	0
72	48
73	0

n	a(n)
1	1
2	0
3	0
4	2
5	0
6	5
7	0
8	4
9	3
10	7
11	0
12	8
13	0
14	9
15	8
16	8
17	0
18	12
19	0
20	12
21	10
22	13
23	0
24	16
25	5
26	15
27	9
28	16
29	0
30	21
31	0
32	16
33	14
34	19
35	12
36	24
37	0
38	21
39	16
40	24
41	0
42	29
43	0
44	24
45	21
46	25
47	0
48	32
49	7
50	30
51	20
52	28
53	0
54	36
55	16
56	32
57	22
58	31
59	0
60	44
61	0
62	33
63	27
64	32
65	18
66	45
67	0
68	36
69	26
70	45
71	0
72	48
73	0