A338049 - cp's OEIS frontend

A338049 a(n) is the smallest prime that is not less than prime(n) and is such that prime(n)*a(n)+2 is semiprime.

n	a(n)
1	2
2	11
3	11
4	7
5	11
6	19
7	17
8	29
9	29
10	29
11	37
12	37
13	43
14	43
15	61
16	53
17	61
18	71
19	89
20	79
21	73
22	79
23	83
24	103
25	97
26	103
27	107
28	109
29	113
30	127
31	131
32	151
33	137
34	151
35	157
36	197
37	167
38	167
39	173
40	181
41	211
42	199
43	191
44	197
45	199
46	211
47	227
48	257
49	257
50	241
51	233
52	251
53	257
54	251
55	263
56	263
57	269

[2, 11, 11, 7, 11, 19, 17, 29, 29, 29, 37, 37, 43, 43, 61, 53, 61, 71, 89, 79, 73, 79, 83, 103, 97, 103, 107, 109, 113, 127, 131, 151, 137, 151, 157, 197, 167, 167, 173, 181, 211, 199, 191, 197, 199, 211, 227, 257, 257, 241, 233, 251, 257, 251, 263, 263, 269]

cp's OEIS Frontend

A338049 a(n) is the smallest prime that is not less than prime(n) and is such that prime(n)*a(n)+2 is semiprime.

Table of values

List of values

n	a(n)
1	2
2	11
3	11
4	7
5	11
6	19
7	17
8	29
9	29
10	29
11	37
12	37
13	43
14	43
15	61
16	53
17	61
18	71
19	89
20	79
21	73
22	79
23	83
24	103
25	97
26	103
27	107
28	109
29	113
30	127
31	131
32	151
33	137
34	151
35	157
36	197
37	167
38	167
39	173
40	181
41	211
42	199
43	191
44	197
45	199
46	211
47	227
48	257
49	257
50	241
51	233
52	251
53	257
54	251
55	263
56	263
57	269

n	a(n)
1	2
2	11
3	11
4	7
5	11
6	19
7	17
8	29
9	29
10	29
11	37
12	37
13	43
14	43
15	61
16	53
17	61
18	71
19	89
20	79
21	73
22	79
23	83
24	103
25	97
26	103
27	107
28	109
29	113
30	127
31	131
32	151
33	137
34	151
35	157
36	197
37	167
38	167
39	173
40	181
41	211
42	199
43	191
44	197
45	199
46	211
47	227
48	257
49	257
50	241
51	233
52	251
53	257
54	251
55	263
56	263
57	269

n	a(n)
1	2
2	11
3	11
4	7
5	11
6	19
7	17
8	29
9	29
10	29
11	37
12	37
13	43
14	43
15	61
16	53
17	61
18	71
19	89
20	79
21	73
22	79
23	83
24	103
25	97
26	103
27	107
28	109
29	113
30	127
31	131
32	151
33	137
34	151
35	157
36	197
37	167
38	167
39	173
40	181
41	211
42	199
43	191
44	197
45	199
46	211
47	227
48	257
49	257
50	241
51	233
52	251
53	257
54	251
55	263
56	263
57	269