A275418 - cp's OEIS frontend

A275418 Numbers n such that n - 1 has exactly as many odd divisors as n + 1.

n	a(n)
1	3
2	4
3	6
4	11
5	12
6	13
7	18
8	21
9	23
10	25
11	27
12	30
13	34
14	39
15	42
16	45
17	47
18	56
19	57
20	60
21	72
22	75
23	81
24	86
25	87
26	92
27	93
28	94
29	95
30	99
31	102
32	105
33	108
34	109
35	117
36	123
37	124
38	131
39	135
40	138
41	139
42	142
43	144
44	147
45	150
46	155
47	159
48	160
49	165
50	169
51	177
52	180
53	184
54	186
55	192
56	193
57	198
58	202
59	204
60	207
61	213
62	214
63	216

[3, 4, 6, 11, 12, 13, 18, 21, 23, 25, 27, 30, 34, 39, 42, 45, 47, 56, 57, 60, 72, 75, 81, 86, 87, 92, 93, 94, 95, 99, 102, 105, 108, 109, 117, 123, 124, 131, 135, 138, 139, 142, 144, 147, 150, 155, 159, 160, 165, 169, 177, 180, 184, 186, 192, 193, 198, 202, 204, 207, 213, 214, 216]

cp's OEIS Frontend

A275418 Numbers n such that n - 1 has exactly as many odd divisors as n + 1.

Table of values

List of values

n	a(n)
1	3
2	4
3	6
4	11
5	12
6	13
7	18
8	21
9	23
10	25
11	27
12	30
13	34
14	39
15	42
16	45
17	47
18	56
19	57
20	60
21	72
22	75
23	81
24	86
25	87
26	92
27	93
28	94
29	95
30	99
31	102
32	105
33	108
34	109
35	117
36	123
37	124
38	131
39	135
40	138
41	139
42	142
43	144
44	147
45	150
46	155
47	159
48	160
49	165
50	169
51	177
52	180
53	184
54	186
55	192
56	193
57	198
58	202
59	204
60	207
61	213
62	214
63	216

n	a(n)
1	3
2	4
3	6
4	11
5	12
6	13
7	18
8	21
9	23
10	25
11	27
12	30
13	34
14	39
15	42
16	45
17	47
18	56
19	57
20	60
21	72
22	75
23	81
24	86
25	87
26	92
27	93
28	94
29	95
30	99
31	102
32	105
33	108
34	109
35	117
36	123
37	124
38	131
39	135
40	138
41	139
42	142
43	144
44	147
45	150
46	155
47	159
48	160
49	165
50	169
51	177
52	180
53	184
54	186
55	192
56	193
57	198
58	202
59	204
60	207
61	213
62	214
63	216

n	a(n)
1	3
2	4
3	6
4	11
5	12
6	13
7	18
8	21
9	23
10	25
11	27
12	30
13	34
14	39
15	42
16	45
17	47
18	56
19	57
20	60
21	72
22	75
23	81
24	86
25	87
26	92
27	93
28	94
29	95
30	99
31	102
32	105
33	108
34	109
35	117
36	123
37	124
38	131
39	135
40	138
41	139
42	142
43	144
44	147
45	150
46	155
47	159
48	160
49	165
50	169
51	177
52	180
53	184
54	186
55	192
56	193
57	198
58	202
59	204
60	207
61	213
62	214
63	216