A109404 - cp's OEIS frontend

A109404 Numbers n such that sum of n-th and (n+1)-st semiprimes is a prime.

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	13
8	22
9	25
10	27
11	29
12	37
13	46
14	51
15	52
16	76
17	83
18	86
19	92
20	104
21	111
22	113
23	115
24	123
25	132
26	140
27	149
28	190
29	213
30	218
31	222
32	233
33	242
34	274
35	280
36	281
37	286
38	298
39	303
40	307
41	309
42	336
43	340
44	346
45	351
46	379
47	381
48	395
49	402
50	415
51	424
52	444
53	449
54	463
55	477
56	478
57	490

[3, 5, 7, 8, 10, 11, 13, 22, 25, 27, 29, 37, 46, 51, 52, 76, 83, 86, 92, 104, 111, 113, 115, 123, 132, 140, 149, 190, 213, 218, 222, 233, 242, 274, 280, 281, 286, 298, 303, 307, 309, 336, 340, 346, 351, 379, 381, 395, 402, 415, 424, 444, 449, 463, 477, 478, 490]

cp's OEIS Frontend

A109404 Numbers n such that sum of n-th and (n+1)-st semiprimes is a prime.

Table of values

List of values

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	13
8	22
9	25
10	27
11	29
12	37
13	46
14	51
15	52
16	76
17	83
18	86
19	92
20	104
21	111
22	113
23	115
24	123
25	132
26	140
27	149
28	190
29	213
30	218
31	222
32	233
33	242
34	274
35	280
36	281
37	286
38	298
39	303
40	307
41	309
42	336
43	340
44	346
45	351
46	379
47	381
48	395
49	402
50	415
51	424
52	444
53	449
54	463
55	477
56	478
57	490

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	13
8	22
9	25
10	27
11	29
12	37
13	46
14	51
15	52
16	76
17	83
18	86
19	92
20	104
21	111
22	113
23	115
24	123
25	132
26	140
27	149
28	190
29	213
30	218
31	222
32	233
33	242
34	274
35	280
36	281
37	286
38	298
39	303
40	307
41	309
42	336
43	340
44	346
45	351
46	379
47	381
48	395
49	402
50	415
51	424
52	444
53	449
54	463
55	477
56	478
57	490

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	13
8	22
9	25
10	27
11	29
12	37
13	46
14	51
15	52
16	76
17	83
18	86
19	92
20	104
21	111
22	113
23	115
24	123
25	132
26	140
27	149
28	190
29	213
30	218
31	222
32	233
33	242
34	274
35	280
36	281
37	286
38	298
39	303
40	307
41	309
42	336
43	340
44	346
45	351
46	379
47	381
48	395
49	402
50	415
51	424
52	444
53	449
54	463
55	477
56	478
57	490