A344753 - cp's OEIS frontend

A344753 a(n) = sigma(n) + psi(n) - 2n = Sum_{d|n, d d), where mu is Möbius mu-function.

n	a(n)
1	0
2	2
3	2
4	5
5	2
6	12
7	2
8	11
9	7
10	16
11	2
12	28
13	2
14	20
15	18
16	23
17	2
18	39
19	2
20	38
21	22
22	28
23	2
24	60
25	11
26	32
27	22
28	48
29	2
30	84
31	2
32	47
33	30
34	40
35	26
36	91
37	2
38	44
39	34
40	82
41	2
42	108
43	2
44	68
45	60
46	52
47	2
48	124
49	15
50	83
51	42
52	78
53	2
54	120
55	34
56	104
57	46
58	64
59	2
60	192
61	2
62	68
63	74
64	95
65	38
66	156
67	2
68	98
69	54
70	148
71	2
72	195
73	2
74	80
75	94
76	108
77	38
78	180
79	2
80	170
81	67
82	88
83	2

[0, 2, 2, 5, 2, 12, 2, 11, 7, 16, 2, 28, 2, 20, 18, 23, 2, 39, 2, 38, 22, 28, 2, 60, 11, 32, 22, 48, 2, 84, 2, 47, 30, 40, 26, 91, 2, 44, 34, 82, 2, 108, 2, 68, 60, 52, 2, 124, 15, 83, 42, 78, 2, 120, 34, 104, 46, 64, 2, 192, 2, 68, 74, 95, 38, 156, 2, 98, 54, 148, 2, 195, 2, 80, 94, 108, 38, 180, 2, 170, 67, 88, 2]

cp's OEIS Frontend

A344753 a(n) = sigma(n) + psi(n) - 2n = Sum_{d|n, d d), where mu is Möbius mu-function.

Table of values

List of values

n	a(n)
1	0
2	2
3	2
4	5
5	2
6	12
7	2
8	11
9	7
10	16
11	2
12	28
13	2
14	20
15	18
16	23
17	2
18	39
19	2
20	38
21	22
22	28
23	2
24	60
25	11
26	32
27	22
28	48
29	2
30	84
31	2
32	47
33	30
34	40
35	26
36	91
37	2
38	44
39	34
40	82
41	2
42	108
43	2
44	68
45	60
46	52
47	2
48	124
49	15
50	83
51	42
52	78
53	2
54	120
55	34
56	104
57	46
58	64
59	2
60	192
61	2
62	68
63	74
64	95
65	38
66	156
67	2
68	98
69	54
70	148
71	2
72	195
73	2
74	80
75	94
76	108
77	38
78	180
79	2
80	170
81	67
82	88
83	2

n	a(n)
1	0
2	2
3	2
4	5
5	2
6	12
7	2
8	11
9	7
10	16
11	2
12	28
13	2
14	20
15	18
16	23
17	2
18	39
19	2
20	38
21	22
22	28
23	2
24	60
25	11
26	32
27	22
28	48
29	2
30	84
31	2
32	47
33	30
34	40
35	26
36	91
37	2
38	44
39	34
40	82
41	2
42	108
43	2
44	68
45	60
46	52
47	2
48	124
49	15
50	83
51	42
52	78
53	2
54	120
55	34
56	104
57	46
58	64
59	2
60	192
61	2
62	68
63	74
64	95
65	38
66	156
67	2
68	98
69	54
70	148
71	2
72	195
73	2
74	80
75	94
76	108
77	38
78	180
79	2
80	170
81	67
82	88
83	2

n	a(n)
1	0
2	2
3	2
4	5
5	2
6	12
7	2
8	11
9	7
10	16
11	2
12	28
13	2
14	20
15	18
16	23
17	2
18	39
19	2
20	38
21	22
22	28
23	2
24	60
25	11
26	32
27	22
28	48
29	2
30	84
31	2
32	47
33	30
34	40
35	26
36	91
37	2
38	44
39	34
40	82
41	2
42	108
43	2
44	68
45	60
46	52
47	2
48	124
49	15
50	83
51	42
52	78
53	2
54	120
55	34
56	104
57	46
58	64
59	2
60	192
61	2
62	68
63	74
64	95
65	38
66	156
67	2
68	98
69	54
70	148
71	2
72	195
73	2
74	80
75	94
76	108
77	38
78	180
79	2
80	170
81	67
82	88
83	2