A318448 - cp's OEIS frontend

A318448 a(n) = Sum_{d|n} A294898(d), where A294898(d) = A005187(d) - sigma(d).

n	a(n)
1	0
2	0
3	0
4	0
5	2
6	-2
7	3
8	0
9	3
10	2
11	7
12	-8
13	9
14	4
15	4
16	0
17	14
18	-4
19	15
20	-2
21	10
22	12
23	18
24	-22
25	18
26	16
27	13
28	1
29	24
30	-14
31	25
32	0
33	23
34	26
35	24
36	-31
37	33
38	28
39	27
40	-14
41	37
42	-6
43	38
44	13
45	15
46	34
47	41
48	-52
49	41
50	22
51	40
52	19
53	48
54	-10
55	42
56	-10
57	45
58	46
59	53
60	-76
61	55
62	48
63	29
64	0
65	55
66	12
67	63
68	34
69	57
70	18
71	66
72	-98
73	69
74	64
75	42
76	37
77	64
78	16
79	73
80	-42
81	51
82	72
83	78
84	-74
85	74
86	74
87	73
88	6

[0, 0, 0, 0, 2, -2, 3, 0, 3, 2, 7, -8, 9, 4, 4, 0, 14, -4, 15, -2, 10, 12, 18, -22, 18, 16, 13, 1, 24, -14, 25, 0, 23, 26, 24, -31, 33, 28, 27, -14, 37, -6, 38, 13, 15, 34, 41, -52, 41, 22, 40, 19, 48, -10, 42, -10, 45, 46, 53, -76, 55, 48, 29, 0, 55, 12, 63, 34, 57, 18, 66, -98, 69, 64, 42, 37, 64, 16, 73, -42, 51, 72, 78, -74, 74, 74, 73, 6]

cp's OEIS Frontend

A318448 a(n) = Sum_{d|n} A294898(d), where A294898(d) = A005187(d) - sigma(d).

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	2
6	-2
7	3
8	0
9	3
10	2
11	7
12	-8
13	9
14	4
15	4
16	0
17	14
18	-4
19	15
20	-2
21	10
22	12
23	18
24	-22
25	18
26	16
27	13
28	1
29	24
30	-14
31	25
32	0
33	23
34	26
35	24
36	-31
37	33
38	28
39	27
40	-14
41	37
42	-6
43	38
44	13
45	15
46	34
47	41
48	-52
49	41
50	22
51	40
52	19
53	48
54	-10
55	42
56	-10
57	45
58	46
59	53
60	-76
61	55
62	48
63	29
64	0
65	55
66	12
67	63
68	34
69	57
70	18
71	66
72	-98
73	69
74	64
75	42
76	37
77	64
78	16
79	73
80	-42
81	51
82	72
83	78
84	-74
85	74
86	74
87	73
88	6

n	a(n)
1	0
2	0
3	0
4	0
5	2
6	-2
7	3
8	0
9	3
10	2
11	7
12	-8
13	9
14	4
15	4
16	0
17	14
18	-4
19	15
20	-2
21	10
22	12
23	18
24	-22
25	18
26	16
27	13
28	1
29	24
30	-14
31	25
32	0
33	23
34	26
35	24
36	-31
37	33
38	28
39	27
40	-14
41	37
42	-6
43	38
44	13
45	15
46	34
47	41
48	-52
49	41
50	22
51	40
52	19
53	48
54	-10
55	42
56	-10
57	45
58	46
59	53
60	-76
61	55
62	48
63	29
64	0
65	55
66	12
67	63
68	34
69	57
70	18
71	66
72	-98
73	69
74	64
75	42
76	37
77	64
78	16
79	73
80	-42
81	51
82	72
83	78
84	-74
85	74
86	74
87	73
88	6

n	a(n)
1	0
2	0
3	0
4	0
5	2
6	-2
7	3
8	0
9	3
10	2
11	7
12	-8
13	9
14	4
15	4
16	0
17	14
18	-4
19	15
20	-2
21	10
22	12
23	18
24	-22
25	18
26	16
27	13
28	1
29	24
30	-14
31	25
32	0
33	23
34	26
35	24
36	-31
37	33
38	28
39	27
40	-14
41	37
42	-6
43	38
44	13
45	15
46	34
47	41
48	-52
49	41
50	22
51	40
52	19
53	48
54	-10
55	42
56	-10
57	45
58	46
59	53
60	-76
61	55
62	48
63	29
64	0
65	55
66	12
67	63
68	34
69	57
70	18
71	66
72	-98
73	69
74	64
75	42
76	37
77	64
78	16
79	73
80	-42
81	51
82	72
83	78
84	-74
85	74
86	74
87	73
88	6