A085085 - cp's OEIS frontend

A085085 Numerator of Sum_{i=2..t} (d(i)/d(i-1)-1), where d(1), ..., d(t) are the divisors of n.

n	a(n)
1	0
2	1
3	2
4	2
5	4
6	5
7	6
8	3
9	4
10	7
11	10
12	10
13	12
14	9
15	14
16	4
17	16
18	4
19	18
20	17
21	16
22	13
23	22
24	25
25	8
26	15
27	6
28	19
29	28
30	68
31	30
32	5
33	20
34	19
35	42
36	14
37	36
38	21
39	22
40	51
41	40
42	31
43	42
44	23
45	92
46	25
47	46
48	5
49	12
50	6
51	26
52	25
53	52
54	11
55	46
56	79
57	28
58	31
59	58
60	157
61	60
62	33
63	146
64	6
65	48
66	35
67	66
68	29
69	32
70	218
71	70
72	131
73	72
74	39
75	22
76	31
77	88

[0, 1, 2, 2, 4, 5, 6, 3, 4, 7, 10, 10, 12, 9, 14, 4, 16, 4, 18, 17, 16, 13, 22, 25, 8, 15, 6, 19, 28, 68, 30, 5, 20, 19, 42, 14, 36, 21, 22, 51, 40, 31, 42, 23, 92, 25, 46, 5, 12, 6, 26, 25, 52, 11, 46, 79, 28, 31, 58, 157, 60, 33, 146, 6, 48, 35, 66, 29, 32, 218, 70, 131, 72, 39, 22, 31, 88]

cp's OEIS Frontend

A085085 Numerator of Sum_{i=2..t} (d(i)/d(i-1)-1), where d(1), ..., d(t) are the divisors of n.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	2
5	4
6	5
7	6
8	3
9	4
10	7
11	10
12	10
13	12
14	9
15	14
16	4
17	16
18	4
19	18
20	17
21	16
22	13
23	22
24	25
25	8
26	15
27	6
28	19
29	28
30	68
31	30
32	5
33	20
34	19
35	42
36	14
37	36
38	21
39	22
40	51
41	40
42	31
43	42
44	23
45	92
46	25
47	46
48	5
49	12
50	6
51	26
52	25
53	52
54	11
55	46
56	79
57	28
58	31
59	58
60	157
61	60
62	33
63	146
64	6
65	48
66	35
67	66
68	29
69	32
70	218
71	70
72	131
73	72
74	39
75	22
76	31
77	88

n	a(n)
1	0
2	1
3	2
4	2
5	4
6	5
7	6
8	3
9	4
10	7
11	10
12	10
13	12
14	9
15	14
16	4
17	16
18	4
19	18
20	17
21	16
22	13
23	22
24	25
25	8
26	15
27	6
28	19
29	28
30	68
31	30
32	5
33	20
34	19
35	42
36	14
37	36
38	21
39	22
40	51
41	40
42	31
43	42
44	23
45	92
46	25
47	46
48	5
49	12
50	6
51	26
52	25
53	52
54	11
55	46
56	79
57	28
58	31
59	58
60	157
61	60
62	33
63	146
64	6
65	48
66	35
67	66
68	29
69	32
70	218
71	70
72	131
73	72
74	39
75	22
76	31
77	88

n	a(n)
1	0
2	1
3	2
4	2
5	4
6	5
7	6
8	3
9	4
10	7
11	10
12	10
13	12
14	9
15	14
16	4
17	16
18	4
19	18
20	17
21	16
22	13
23	22
24	25
25	8
26	15
27	6
28	19
29	28
30	68
31	30
32	5
33	20
34	19
35	42
36	14
37	36
38	21
39	22
40	51
41	40
42	31
43	42
44	23
45	92
46	25
47	46
48	5
49	12
50	6
51	26
52	25
53	52
54	11
55	46
56	79
57	28
58	31
59	58
60	157
61	60
62	33
63	146
64	6
65	48
66	35
67	66
68	29
69	32
70	218
71	70
72	131
73	72
74	39
75	22
76	31
77	88