A134322 - cp's OEIS frontend

A134322 Positive integers with fewer non-isolated divisors than isolated divisors. A divisor, k, of n is non-isolated if (k-1) or (k+1) also divides n. A divisor, k, of n is isolated if neither (k-1) nor (k+1) divides n.

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	16
10	17
11	19
12	21
13	23
14	25
15	27
16	28
17	29
18	31
19	32
20	33
21	35
22	36
23	37
24	39
25	41
26	43
27	44
28	45
29	47
30	48
31	49
32	50
33	51
34	52
35	53
36	54
37	55
38	57
39	59
40	61
41	63
42	64
43	65
44	66
45	67
46	68
47	69
48	70
49	71
50	73
51	75
52	76
53	77
54	78
55	79
56	80
57	81
58	83
59	85
60	87
61	88
62	89
63	91
64	92
65	93
66	95
67	96
68	97
69	98
70	99
71	100

[1, 3, 5, 7, 9, 11, 13, 15, 16, 17, 19, 21, 23, 25, 27, 28, 29, 31, 32, 33, 35, 36, 37, 39, 41, 43, 44, 45, 47, 48, 49, 50, 51, 52, 53, 54, 55, 57, 59, 61, 63, 64, 65, 66, 67, 68, 69, 70, 71, 73, 75, 76, 77, 78, 79, 80, 81, 83, 85, 87, 88, 89, 91, 92, 93, 95, 96, 97, 98, 99, 100]

cp's OEIS Frontend

A134322 Positive integers with fewer non-isolated divisors than isolated divisors. A divisor, k, of n is non-isolated if (k-1) or (k+1) also divides n. A divisor, k, of n is isolated if neither (k-1) nor (k+1) divides n.

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	16
10	17
11	19
12	21
13	23
14	25
15	27
16	28
17	29
18	31
19	32
20	33
21	35
22	36
23	37
24	39
25	41
26	43
27	44
28	45
29	47
30	48
31	49
32	50
33	51
34	52
35	53
36	54
37	55
38	57
39	59
40	61
41	63
42	64
43	65
44	66
45	67
46	68
47	69
48	70
49	71
50	73
51	75
52	76
53	77
54	78
55	79
56	80
57	81
58	83
59	85
60	87
61	88
62	89
63	91
64	92
65	93
66	95
67	96
68	97
69	98
70	99
71	100

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	16
10	17
11	19
12	21
13	23
14	25
15	27
16	28
17	29
18	31
19	32
20	33
21	35
22	36
23	37
24	39
25	41
26	43
27	44
28	45
29	47
30	48
31	49
32	50
33	51
34	52
35	53
36	54
37	55
38	57
39	59
40	61
41	63
42	64
43	65
44	66
45	67
46	68
47	69
48	70
49	71
50	73
51	75
52	76
53	77
54	78
55	79
56	80
57	81
58	83
59	85
60	87
61	88
62	89
63	91
64	92
65	93
66	95
67	96
68	97
69	98
70	99
71	100

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	16
10	17
11	19
12	21
13	23
14	25
15	27
16	28
17	29
18	31
19	32
20	33
21	35
22	36
23	37
24	39
25	41
26	43
27	44
28	45
29	47
30	48
31	49
32	50
33	51
34	52
35	53
36	54
37	55
38	57
39	59
40	61
41	63
42	64
43	65
44	66
45	67
46	68
47	69
48	70
49	71
50	73
51	75
52	76
53	77
54	78
55	79
56	80
57	81
58	83
59	85
60	87
61	88
62	89
63	91
64	92
65	93
66	95
67	96
68	97
69	98
70	99
71	100