A383220 - cp's OEIS frontend

A383220 Integers k such that rad(k)*2^(k/rad(k)) + 1 is prime where rad = A007947.

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	11
7	14
8	15
9	20
10	21
11	23
12	24
13	26
14	29
15	30
16	33
17	35
18	39
19	41
20	44
21	51
22	53
23	65
24	68
25	69
26	74
27	78
28	83
29	86
30	88
31	89
32	90
33	95
34	105
35	111
36	113
37	114
38	116
39	117
40	119
41	125
42	126
43	131
44	134
45	135
46	138
47	140
48	141
49	146
50	147
51	153
52	155
53	156
54	158
55	165
56	168
57	171
58	173
59	174
60	179

[1, 2, 3, 5, 6, 11, 14, 15, 20, 21, 23, 24, 26, 29, 30, 33, 35, 39, 41, 44, 51, 53, 65, 68, 69, 74, 78, 83, 86, 88, 89, 90, 95, 105, 111, 113, 114, 116, 117, 119, 125, 126, 131, 134, 135, 138, 140, 141, 146, 147, 153, 155, 156, 158, 165, 168, 171, 173, 174, 179]

cp's OEIS Frontend

A383220 Integers k such that rad(k)*2^(k/rad(k)) + 1 is prime where rad = A007947.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	11
7	14
8	15
9	20
10	21
11	23
12	24
13	26
14	29
15	30
16	33
17	35
18	39
19	41
20	44
21	51
22	53
23	65
24	68
25	69
26	74
27	78
28	83
29	86
30	88
31	89
32	90
33	95
34	105
35	111
36	113
37	114
38	116
39	117
40	119
41	125
42	126
43	131
44	134
45	135
46	138
47	140
48	141
49	146
50	147
51	153
52	155
53	156
54	158
55	165
56	168
57	171
58	173
59	174
60	179

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	11
7	14
8	15
9	20
10	21
11	23
12	24
13	26
14	29
15	30
16	33
17	35
18	39
19	41
20	44
21	51
22	53
23	65
24	68
25	69
26	74
27	78
28	83
29	86
30	88
31	89
32	90
33	95
34	105
35	111
36	113
37	114
38	116
39	117
40	119
41	125
42	126
43	131
44	134
45	135
46	138
47	140
48	141
49	146
50	147
51	153
52	155
53	156
54	158
55	165
56	168
57	171
58	173
59	174
60	179

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	11
7	14
8	15
9	20
10	21
11	23
12	24
13	26
14	29
15	30
16	33
17	35
18	39
19	41
20	44
21	51
22	53
23	65
24	68
25	69
26	74
27	78
28	83
29	86
30	88
31	89
32	90
33	95
34	105
35	111
36	113
37	114
38	116
39	117
40	119
41	125
42	126
43	131
44	134
45	135
46	138
47	140
48	141
49	146
50	147
51	153
52	155
53	156
54	158
55	165
56	168
57	171
58	173
59	174
60	179