A344705 - cp's OEIS frontend

A344705 a(n) = n + A001615(n) - sigma(n), where A001615 is the Dedekind psi-function, and sigma(n) gives the sum of divisors of n; difference between psi and the sum of proper divisors.

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

[1, 2, 3, 3, 5, 6, 7, 5, 8, 10, 11, 8, 13, 14, 15, 9, 17, 15, 19, 14, 21, 22, 23, 12, 24, 26, 23, 20, 29, 30, 31, 17, 33, 34, 35, 17, 37, 38, 39, 22, 41, 42, 43, 32, 39, 46, 47, 20, 48, 47, 51, 38, 53, 42, 55, 32, 57, 58, 59, 36, 61, 62, 55, 33, 65, 66, 67, 50, 69, 70, 71, 21, 73, 74, 71, 56, 77, 78, 79, 38, 68, 82]

cp's OEIS Frontend

A344705 a(n) = n + A001615(n) - sigma(n), where A001615 is the Dedekind psi-function, and sigma(n) gives the sum of divisors of n; difference between psi and the sum of proper divisors.

Table of values

List of values

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

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

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