A228947 - cp's OEIS frontend

A228947 a(n) = sigma(n) - phi(n) - n.

n	a(n)
1	-1
2	0
3	-1
4	1
5	-3
6	4
7	-5
8	3
9	-2
10	4
11	-9
12	12
13	-11
14	4
15	1
16	7
17	-15
18	15
19	-17
20	14
21	-1
22	4
23	-21
24	28
25	-14
26	4
27	-5
28	16
29	-27
30	34
31	-29
32	15
33	-5
34	4
35	-11
36	43
37	-35
38	4
39	-7
40	34
41	-39
42	42
43	-41
44	20
45	9
46	4
47	-45
48	60
49	-34
50	23
51	-11
52	22
53	-51
54	48
55	-23
56	40
57	-13
58	4
59	-57
60	92
61	-59

[-1, 0, -1, 1, -3, 4, -5, 3, -2, 4, -9, 12, -11, 4, 1, 7, -15, 15, -17, 14, -1, 4, -21, 28, -14, 4, -5, 16, -27, 34, -29, 15, -5, 4, -11, 43, -35, 4, -7, 34, -39, 42, -41, 20, 9, 4, -45, 60, -34, 23, -11, 22, -51, 48, -23, 40, -13, 4, -57, 92, -59]

cp's OEIS Frontend

A228947 a(n) = sigma(n) - phi(n) - n.

Table of values

List of values

n	a(n)
1	-1
2	0
3	-1
4	1
5	-3
6	4
7	-5
8	3
9	-2
10	4
11	-9
12	12
13	-11
14	4
15	1
16	7
17	-15
18	15
19	-17
20	14
21	-1
22	4
23	-21
24	28
25	-14
26	4
27	-5
28	16
29	-27
30	34
31	-29
32	15
33	-5
34	4
35	-11
36	43
37	-35
38	4
39	-7
40	34
41	-39
42	42
43	-41
44	20
45	9
46	4
47	-45
48	60
49	-34
50	23
51	-11
52	22
53	-51
54	48
55	-23
56	40
57	-13
58	4
59	-57
60	92
61	-59

n	a(n)
1	-1
2	0
3	-1
4	1
5	-3
6	4
7	-5
8	3
9	-2
10	4
11	-9
12	12
13	-11
14	4
15	1
16	7
17	-15
18	15
19	-17
20	14
21	-1
22	4
23	-21
24	28
25	-14
26	4
27	-5
28	16
29	-27
30	34
31	-29
32	15
33	-5
34	4
35	-11
36	43
37	-35
38	4
39	-7
40	34
41	-39
42	42
43	-41
44	20
45	9
46	4
47	-45
48	60
49	-34
50	23
51	-11
52	22
53	-51
54	48
55	-23
56	40
57	-13
58	4
59	-57
60	92
61	-59

n	a(n)
1	-1
2	0
3	-1
4	1
5	-3
6	4
7	-5
8	3
9	-2
10	4
11	-9
12	12
13	-11
14	4
15	1
16	7
17	-15
18	15
19	-17
20	14
21	-1
22	4
23	-21
24	28
25	-14
26	4
27	-5
28	16
29	-27
30	34
31	-29
32	15
33	-5
34	4
35	-11
36	43
37	-35
38	4
39	-7
40	34
41	-39
42	42
43	-41
44	20
45	9
46	4
47	-45
48	60
49	-34
50	23
51	-11
52	22
53	-51
54	48
55	-23
56	40
57	-13
58	4
59	-57
60	92
61	-59