A247015 - cp's OEIS frontend

A247015 Number of integers x smaller than n and that satisfy sigma(x)/x > sigma(n)/n where sigma is the sum of divisors.

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

[0, 0, 1, 0, 3, 0, 5, 1, 4, 2, 9, 0, 11, 5, 6, 2, 15, 1, 17, 2, 10, 9, 21, 0, 16, 11, 15, 4, 27, 1, 29, 7, 19, 16, 22, 0, 35, 18, 24, 4, 39, 4, 41, 12, 16, 23, 45, 0, 35, 15, 32, 14, 51, 7, 37, 9, 36, 29, 57, 0, 59, 31, 24, 14, 45, 9, 65, 22, 44, 13, 69, 1, 71]

cp's OEIS Frontend

A247015 Number of integers x smaller than n and that satisfy sigma(x)/x > sigma(n)/n where sigma is the sum of divisors.

Table of values

List of values

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

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

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