A023899 - cp's OEIS frontend

A023899 Integer values of divisor balance: Sum_{d divides k} {d / phi(d)} for numbers k in A023898.

n	a(n)
1	1
2	3
3	5
4	7
5	4
6	9
7	12
8	11
9	20
10	9
11	13
12	28
13	7
14	27
15	10
16	26
17	15
18	36
19	21
20	45
21	14
22	25
23	17
24	44
25	25
26	35
27	63
28	8
29	42
30	42
31	16
32	19
33	7
34	52
35	6
36	49
37	81
38	24
39	10
40	30
41	40
42	70
43	78
44	21
45	21
46	19
47	60
48	18
49	63
50	99
51	40
52	30
53	98
54	7
55	18
56	75
57	15
58	23
59	57
60	35
61	30
62	57
63	68
64	75
65	36
66	35
67	30
68	77
69	55
70	74
71	91
72	117

[1, 3, 5, 7, 4, 9, 12, 11, 20, 9, 13, 28, 7, 27, 10, 26, 15, 36, 21, 45, 14, 25, 17, 44, 25, 35, 63, 8, 42, 42, 16, 19, 7, 52, 6, 49, 81, 24, 10, 30, 40, 70, 78, 21, 21, 19, 60, 18, 63, 99, 40, 30, 98, 7, 18, 75, 15, 23, 57, 35, 30, 57, 68, 75, 36, 35, 30, 77, 55, 74, 91, 117]

cp's OEIS Frontend

A023899 Integer values of divisor balance: Sum_{d divides k} {d / phi(d)} for numbers k in A023898.

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	4
6	9
7	12
8	11
9	20
10	9
11	13
12	28
13	7
14	27
15	10
16	26
17	15
18	36
19	21
20	45
21	14
22	25
23	17
24	44
25	25
26	35
27	63
28	8
29	42
30	42
31	16
32	19
33	7
34	52
35	6
36	49
37	81
38	24
39	10
40	30
41	40
42	70
43	78
44	21
45	21
46	19
47	60
48	18
49	63
50	99
51	40
52	30
53	98
54	7
55	18
56	75
57	15
58	23
59	57
60	35
61	30
62	57
63	68
64	75
65	36
66	35
67	30
68	77
69	55
70	74
71	91
72	117

n	a(n)
1	1
2	3
3	5
4	7
5	4
6	9
7	12
8	11
9	20
10	9
11	13
12	28
13	7
14	27
15	10
16	26
17	15
18	36
19	21
20	45
21	14
22	25
23	17
24	44
25	25
26	35
27	63
28	8
29	42
30	42
31	16
32	19
33	7
34	52
35	6
36	49
37	81
38	24
39	10
40	30
41	40
42	70
43	78
44	21
45	21
46	19
47	60
48	18
49	63
50	99
51	40
52	30
53	98
54	7
55	18
56	75
57	15
58	23
59	57
60	35
61	30
62	57
63	68
64	75
65	36
66	35
67	30
68	77
69	55
70	74
71	91
72	117

n	a(n)
1	1
2	3
3	5
4	7
5	4
6	9
7	12
8	11
9	20
10	9
11	13
12	28
13	7
14	27
15	10
16	26
17	15
18	36
19	21
20	45
21	14
22	25
23	17
24	44
25	25
26	35
27	63
28	8
29	42
30	42
31	16
32	19
33	7
34	52
35	6
36	49
37	81
38	24
39	10
40	30
41	40
42	70
43	78
44	21
45	21
46	19
47	60
48	18
49	63
50	99
51	40
52	30
53	98
54	7
55	18
56	75
57	15
58	23
59	57
60	35
61	30
62	57
63	68
64	75
65	36
66	35
67	30
68	77
69	55
70	74
71	91
72	117