A080997 - cp's OEIS frontend

A080997 The positive integers arranged in nonincreasing order of centrality (the fraction of n represented by the average gcd of n and the other positive integers).

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	5
7	8
8	12
9	10
10	7
11	9
12	15
13	14
14	18
15	16
16	20
17	24
18	11
19	30
20	13
21	21
22	28
23	22
24	36
25	17
26	40
27	27
28	26
29	42
30	32
31	48
32	25
33	19
34	60
35	33
36	35
37	45
38	44
39	34
40	23
41	54
42	56
43	39
44	72
45	50
46	38
47	52
48	84
49	66
50	70
51	90
52	63
53	29
54	80
55	46
56	31
57	51
58	64
59	120
60	55
61	78
62	96
63	75
64	68
65	57
66	108
67	49
68	88
69	37
70	65
71	105

[1, 2, 3, 4, 6, 5, 8, 12, 10, 7, 9, 15, 14, 18, 16, 20, 24, 11, 30, 13, 21, 28, 22, 36, 17, 40, 27, 26, 42, 32, 48, 25, 19, 60, 33, 35, 45, 44, 34, 23, 54, 56, 39, 72, 50, 38, 52, 84, 66, 70, 90, 63, 29, 80, 46, 31, 51, 64, 120, 55, 78, 96, 75, 68, 57, 108, 49, 88, 37, 65, 105]

cp's OEIS Frontend

A080997 The positive integers arranged in nonincreasing order of centrality (the fraction of n represented by the average gcd of n and the other positive integers).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	5
7	8
8	12
9	10
10	7
11	9
12	15
13	14
14	18
15	16
16	20
17	24
18	11
19	30
20	13
21	21
22	28
23	22
24	36
25	17
26	40
27	27
28	26
29	42
30	32
31	48
32	25
33	19
34	60
35	33
36	35
37	45
38	44
39	34
40	23
41	54
42	56
43	39
44	72
45	50
46	38
47	52
48	84
49	66
50	70
51	90
52	63
53	29
54	80
55	46
56	31
57	51
58	64
59	120
60	55
61	78
62	96
63	75
64	68
65	57
66	108
67	49
68	88
69	37
70	65
71	105

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	5
7	8
8	12
9	10
10	7
11	9
12	15
13	14
14	18
15	16
16	20
17	24
18	11
19	30
20	13
21	21
22	28
23	22
24	36
25	17
26	40
27	27
28	26
29	42
30	32
31	48
32	25
33	19
34	60
35	33
36	35
37	45
38	44
39	34
40	23
41	54
42	56
43	39
44	72
45	50
46	38
47	52
48	84
49	66
50	70
51	90
52	63
53	29
54	80
55	46
56	31
57	51
58	64
59	120
60	55
61	78
62	96
63	75
64	68
65	57
66	108
67	49
68	88
69	37
70	65
71	105

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	5
7	8
8	12
9	10
10	7
11	9
12	15
13	14
14	18
15	16
16	20
17	24
18	11
19	30
20	13
21	21
22	28
23	22
24	36
25	17
26	40
27	27
28	26
29	42
30	32
31	48
32	25
33	19
34	60
35	33
36	35
37	45
38	44
39	34
40	23
41	54
42	56
43	39
44	72
45	50
46	38
47	52
48	84
49	66
50	70
51	90
52	63
53	29
54	80
55	46
56	31
57	51
58	64
59	120
60	55
61	78
62	96
63	75
64	68
65	57
66	108
67	49
68	88
69	37
70	65
71	105