A295302 - cp's OEIS frontend

A295302 a(n) = sigma(phi(n)) - n, where phi = A000010 and sigma = A000203.

n	a(n)
1	0
2	-1
3	0
4	-1
5	2
6	-3
7	5
8	-1
9	3
10	-3
11	7
12	-5
13	15
14	-2
15	0
16	-1
17	14
18	-6
19	20
20	-5
21	7
22	-4
23	13
24	-9
25	17
26	2
27	12
28	0
29	27
30	-15
31	41
32	-1
33	9
34	-3
35	25
36	-8
37	54
38	1
39	21
40	-9
41	49
42	-14
43	53
44	-2
45	15
46	-10
47	25
48	-17
49	47
50	-8
51	12
52	8
53	45
54	-15
55	35
56	4
57	34
58	-2
59	31
60	-29
61	107
62	10
63	28
64	-1
65	59
66	-24
67	77
68	-5
69	15
70	-10
71	73
72	-12
73	122
74	17
75	15
76	15
77	91
78	-18
79	89
80	-17
81	39
82	8

[0, -1, 0, -1, 2, -3, 5, -1, 3, -3, 7, -5, 15, -2, 0, -1, 14, -6, 20, -5, 7, -4, 13, -9, 17, 2, 12, 0, 27, -15, 41, -1, 9, -3, 25, -8, 54, 1, 21, -9, 49, -14, 53, -2, 15, -10, 25, -17, 47, -8, 12, 8, 45, -15, 35, 4, 34, -2, 31, -29, 107, 10, 28, -1, 59, -24, 77, -5, 15, -10, 73, -12, 122, 17, 15, 15, 91, -18, 89, -17, 39, 8]

cp's OEIS Frontend

A295302 a(n) = sigma(phi(n)) - n, where phi = A000010 and sigma = A000203.

Table of values

List of values

n	a(n)
1	0
2	-1
3	0
4	-1
5	2
6	-3
7	5
8	-1
9	3
10	-3
11	7
12	-5
13	15
14	-2
15	0
16	-1
17	14
18	-6
19	20
20	-5
21	7
22	-4
23	13
24	-9
25	17
26	2
27	12
28	0
29	27
30	-15
31	41
32	-1
33	9
34	-3
35	25
36	-8
37	54
38	1
39	21
40	-9
41	49
42	-14
43	53
44	-2
45	15
46	-10
47	25
48	-17
49	47
50	-8
51	12
52	8
53	45
54	-15
55	35
56	4
57	34
58	-2
59	31
60	-29
61	107
62	10
63	28
64	-1
65	59
66	-24
67	77
68	-5
69	15
70	-10
71	73
72	-12
73	122
74	17
75	15
76	15
77	91
78	-18
79	89
80	-17
81	39
82	8

n	a(n)
1	0
2	-1
3	0
4	-1
5	2
6	-3
7	5
8	-1
9	3
10	-3
11	7
12	-5
13	15
14	-2
15	0
16	-1
17	14
18	-6
19	20
20	-5
21	7
22	-4
23	13
24	-9
25	17
26	2
27	12
28	0
29	27
30	-15
31	41
32	-1
33	9
34	-3
35	25
36	-8
37	54
38	1
39	21
40	-9
41	49
42	-14
43	53
44	-2
45	15
46	-10
47	25
48	-17
49	47
50	-8
51	12
52	8
53	45
54	-15
55	35
56	4
57	34
58	-2
59	31
60	-29
61	107
62	10
63	28
64	-1
65	59
66	-24
67	77
68	-5
69	15
70	-10
71	73
72	-12
73	122
74	17
75	15
76	15
77	91
78	-18
79	89
80	-17
81	39
82	8

n	a(n)
1	0
2	-1
3	0
4	-1
5	2
6	-3
7	5
8	-1
9	3
10	-3
11	7
12	-5
13	15
14	-2
15	0
16	-1
17	14
18	-6
19	20
20	-5
21	7
22	-4
23	13
24	-9
25	17
26	2
27	12
28	0
29	27
30	-15
31	41
32	-1
33	9
34	-3
35	25
36	-8
37	54
38	1
39	21
40	-9
41	49
42	-14
43	53
44	-2
45	15
46	-10
47	25
48	-17
49	47
50	-8
51	12
52	8
53	45
54	-15
55	35
56	4
57	34
58	-2
59	31
60	-29
61	107
62	10
63	28
64	-1
65	59
66	-24
67	77
68	-5
69	15
70	-10
71	73
72	-12
73	122
74	17
75	15
76	15
77	91
78	-18
79	89
80	-17
81	39
82	8