A234520 - cp's OEIS frontend

A234520 Composite numbers n sorted by decreasing values of beta(n) = sigma(n)^(1/n) - (n+1)^(1/n), where sigma(n) = A000203(n) = the sum of divisors of n.

n	a(n)
1	4
2	6
3	8
4	12
5	10
6	18
7	16
8	24
9	14
10	20
11	9
12	15
13	30
14	36
15	28
16	22
17	32
18	40
19	48
20	42
21	21
22	26
23	60
24	54
25	44
26	27
27	72
28	56
29	34
30	50
31	45
32	52
33	38
34	66
35	84
36	33
37	64
38	90
39	80
40	70
41	96
42	78
43	46
44	39
45	120
46	68
47	108
48	35
49	88
50	76
51	63
52	25
53	100
54	58
55	102
56	126
57	144
58	112
59	132
60	62
61	104
62	75
63	51
64	92

[4, 6, 8, 12, 10, 18, 16, 24, 14, 20, 9, 15, 30, 36, 28, 22, 32, 40, 48, 42, 21, 26, 60, 54, 44, 27, 72, 56, 34, 50, 45, 52, 38, 66, 84, 33, 64, 90, 80, 70, 96, 78, 46, 39, 120, 68, 108, 35, 88, 76, 63, 25, 100, 58, 102, 126, 144, 112, 132, 62, 104, 75, 51, 92]

cp's OEIS Frontend

A234520 Composite numbers n sorted by decreasing values of beta(n) = sigma(n)^(1/n) - (n+1)^(1/n), where sigma(n) = A000203(n) = the sum of divisors of n.

Table of values

List of values

n	a(n)
1	4
2	6
3	8
4	12
5	10
6	18
7	16
8	24
9	14
10	20
11	9
12	15
13	30
14	36
15	28
16	22
17	32
18	40
19	48
20	42
21	21
22	26
23	60
24	54
25	44
26	27
27	72
28	56
29	34
30	50
31	45
32	52
33	38
34	66
35	84
36	33
37	64
38	90
39	80
40	70
41	96
42	78
43	46
44	39
45	120
46	68
47	108
48	35
49	88
50	76
51	63
52	25
53	100
54	58
55	102
56	126
57	144
58	112
59	132
60	62
61	104
62	75
63	51
64	92

n	a(n)
1	4
2	6
3	8
4	12
5	10
6	18
7	16
8	24
9	14
10	20
11	9
12	15
13	30
14	36
15	28
16	22
17	32
18	40
19	48
20	42
21	21
22	26
23	60
24	54
25	44
26	27
27	72
28	56
29	34
30	50
31	45
32	52
33	38
34	66
35	84
36	33
37	64
38	90
39	80
40	70
41	96
42	78
43	46
44	39
45	120
46	68
47	108
48	35
49	88
50	76
51	63
52	25
53	100
54	58
55	102
56	126
57	144
58	112
59	132
60	62
61	104
62	75
63	51
64	92

n	a(n)
1	4
2	6
3	8
4	12
5	10
6	18
7	16
8	24
9	14
10	20
11	9
12	15
13	30
14	36
15	28
16	22
17	32
18	40
19	48
20	42
21	21
22	26
23	60
24	54
25	44
26	27
27	72
28	56
29	34
30	50
31	45
32	52
33	38
34	66
35	84
36	33
37	64
38	90
39	80
40	70
41	96
42	78
43	46
44	39
45	120
46	68
47	108
48	35
49	88
50	76
51	63
52	25
53	100
54	58
55	102
56	126
57	144
58	112
59	132
60	62
61	104
62	75
63	51
64	92