A086552 - cp's OEIS frontend

A086552 Numbers x such that tau(x)/tau(x-1) is an integer, where tau() is the number of divisors function.

n	a(n)
1	2
2	3
3	6
4	8
5	12
6	14
7	15
8	18
9	20
10	22
11	24
12	27
13	30
14	32
15	34
16	35
17	38
18	39
19	40
20	42
21	44
22	45
23	48
24	50
25	54
26	56
27	58
28	60
29	62
30	66
31	68
32	70
33	72
34	74
35	76
36	78
37	80
38	84
39	86
40	87
41	88
42	90
43	94
44	95
45	96
46	98
47	99
48	102
49	104
50	105
51	108
52	110
53	114
54	117
55	119
56	120
57	123
58	126
59	128
60	130
61	132
62	134
63	135
64	136
65	138

[2, 3, 6, 8, 12, 14, 15, 18, 20, 22, 24, 27, 30, 32, 34, 35, 38, 39, 40, 42, 44, 45, 48, 50, 54, 56, 58, 60, 62, 66, 68, 70, 72, 74, 76, 78, 80, 84, 86, 87, 88, 90, 94, 95, 96, 98, 99, 102, 104, 105, 108, 110, 114, 117, 119, 120, 123, 126, 128, 130, 132, 134, 135, 136, 138]

cp's OEIS Frontend

A086552 Numbers x such that tau(x)/tau(x-1) is an integer, where tau() is the number of divisors function.

Table of values

List of values

n	a(n)
1	2
2	3
3	6
4	8
5	12
6	14
7	15
8	18
9	20
10	22
11	24
12	27
13	30
14	32
15	34
16	35
17	38
18	39
19	40
20	42
21	44
22	45
23	48
24	50
25	54
26	56
27	58
28	60
29	62
30	66
31	68
32	70
33	72
34	74
35	76
36	78
37	80
38	84
39	86
40	87
41	88
42	90
43	94
44	95
45	96
46	98
47	99
48	102
49	104
50	105
51	108
52	110
53	114
54	117
55	119
56	120
57	123
58	126
59	128
60	130
61	132
62	134
63	135
64	136
65	138

n	a(n)
1	2
2	3
3	6
4	8
5	12
6	14
7	15
8	18
9	20
10	22
11	24
12	27
13	30
14	32
15	34
16	35
17	38
18	39
19	40
20	42
21	44
22	45
23	48
24	50
25	54
26	56
27	58
28	60
29	62
30	66
31	68
32	70
33	72
34	74
35	76
36	78
37	80
38	84
39	86
40	87
41	88
42	90
43	94
44	95
45	96
46	98
47	99
48	102
49	104
50	105
51	108
52	110
53	114
54	117
55	119
56	120
57	123
58	126
59	128
60	130
61	132
62	134
63	135
64	136
65	138

n	a(n)
1	2
2	3
3	6
4	8
5	12
6	14
7	15
8	18
9	20
10	22
11	24
12	27
13	30
14	32
15	34
16	35
17	38
18	39
19	40
20	42
21	44
22	45
23	48
24	50
25	54
26	56
27	58
28	60
29	62
30	66
31	68
32	70
33	72
34	74
35	76
36	78
37	80
38	84
39	86
40	87
41	88
42	90
43	94
44	95
45	96
46	98
47	99
48	102
49	104
50	105
51	108
52	110
53	114
54	117
55	119
56	120
57	123
58	126
59	128
60	130
61	132
62	134
63	135
64	136
65	138