A036455 - cp's OEIS frontend

A036455 Numbers n such that d(d(n)) is an odd prime, where d(k) is the number of divisors of k.

n	a(n)
1	6
2	8
3	10
4	14
5	15
6	21
7	22
8	26
9	27
10	33
11	34
12	35
13	36
14	38
15	39
16	46
17	51
18	55
19	57
20	58
21	62
22	65
23	69
24	74
25	77
26	82
27	85
28	86
29	87
30	91
31	93
32	94
33	95
34	100
35	106
36	111
37	115
38	118
39	119
40	120
41	122
42	123
43	125
44	129
45	133
46	134
47	141
48	142
49	143
50	145
51	146
52	155
53	158
54	159
55	161
56	166
57	168
58	177
59	178
60	183

[6, 8, 10, 14, 15, 21, 22, 26, 27, 33, 34, 35, 36, 38, 39, 46, 51, 55, 57, 58, 62, 65, 69, 74, 77, 82, 85, 86, 87, 91, 93, 94, 95, 100, 106, 111, 115, 118, 119, 120, 122, 123, 125, 129, 133, 134, 141, 142, 143, 145, 146, 155, 158, 159, 161, 166, 168, 177, 178, 183]

cp's OEIS Frontend

A036455 Numbers n such that d(d(n)) is an odd prime, where d(k) is the number of divisors of k.

Table of values

List of values

n	a(n)
1	6
2	8
3	10
4	14
5	15
6	21
7	22
8	26
9	27
10	33
11	34
12	35
13	36
14	38
15	39
16	46
17	51
18	55
19	57
20	58
21	62
22	65
23	69
24	74
25	77
26	82
27	85
28	86
29	87
30	91
31	93
32	94
33	95
34	100
35	106
36	111
37	115
38	118
39	119
40	120
41	122
42	123
43	125
44	129
45	133
46	134
47	141
48	142
49	143
50	145
51	146
52	155
53	158
54	159
55	161
56	166
57	168
58	177
59	178
60	183

n	a(n)
1	6
2	8
3	10
4	14
5	15
6	21
7	22
8	26
9	27
10	33
11	34
12	35
13	36
14	38
15	39
16	46
17	51
18	55
19	57
20	58
21	62
22	65
23	69
24	74
25	77
26	82
27	85
28	86
29	87
30	91
31	93
32	94
33	95
34	100
35	106
36	111
37	115
38	118
39	119
40	120
41	122
42	123
43	125
44	129
45	133
46	134
47	141
48	142
49	143
50	145
51	146
52	155
53	158
54	159
55	161
56	166
57	168
58	177
59	178
60	183

n	a(n)
1	6
2	8
3	10
4	14
5	15
6	21
7	22
8	26
9	27
10	33
11	34
12	35
13	36
14	38
15	39
16	46
17	51
18	55
19	57
20	58
21	62
22	65
23	69
24	74
25	77
26	82
27	85
28	86
29	87
30	91
31	93
32	94
33	95
34	100
35	106
36	111
37	115
38	118
39	119
40	120
41	122
42	123
43	125
44	129
45	133
46	134
47	141
48	142
49	143
50	145
51	146
52	155
53	158
54	159
55	161
56	166
57	168
58	177
59	178
60	183