A283809 - cp's OEIS frontend

A283809 Squarefree numbers k such that 6k - 1 and 6k + 1 are twin primes.

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	10
7	17
8	23
9	30
10	33
11	38
12	47
13	58
14	70
15	77
16	87
17	95
18	103
19	107
20	110
21	137
22	138
23	143
24	170
25	177
26	182
27	205
28	213
29	215
30	217
31	238
32	247
33	278
34	283
35	287
36	298
37	313
38	322
39	347
40	355
41	357
42	373
43	385
44	390
45	397
46	443
47	455
48	465
49	467
50	542
51	543
52	555
53	562
54	565
55	577
56	590
57	593
58	597
59	642
60	653
61	655
62	667
63	670
64	682

[1, 2, 3, 5, 7, 10, 17, 23, 30, 33, 38, 47, 58, 70, 77, 87, 95, 103, 107, 110, 137, 138, 143, 170, 177, 182, 205, 213, 215, 217, 238, 247, 278, 283, 287, 298, 313, 322, 347, 355, 357, 373, 385, 390, 397, 443, 455, 465, 467, 542, 543, 555, 562, 565, 577, 590, 593, 597, 642, 653, 655, 667, 670, 682]

cp's OEIS Frontend

A283809 Squarefree numbers k such that 6k - 1 and 6k + 1 are twin primes.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	10
7	17
8	23
9	30
10	33
11	38
12	47
13	58
14	70
15	77
16	87
17	95
18	103
19	107
20	110
21	137
22	138
23	143
24	170
25	177
26	182
27	205
28	213
29	215
30	217
31	238
32	247
33	278
34	283
35	287
36	298
37	313
38	322
39	347
40	355
41	357
42	373
43	385
44	390
45	397
46	443
47	455
48	465
49	467
50	542
51	543
52	555
53	562
54	565
55	577
56	590
57	593
58	597
59	642
60	653
61	655
62	667
63	670
64	682

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	10
7	17
8	23
9	30
10	33
11	38
12	47
13	58
14	70
15	77
16	87
17	95
18	103
19	107
20	110
21	137
22	138
23	143
24	170
25	177
26	182
27	205
28	213
29	215
30	217
31	238
32	247
33	278
34	283
35	287
36	298
37	313
38	322
39	347
40	355
41	357
42	373
43	385
44	390
45	397
46	443
47	455
48	465
49	467
50	542
51	543
52	555
53	562
54	565
55	577
56	590
57	593
58	597
59	642
60	653
61	655
62	667
63	670
64	682

cp's OEIS Frontend

A283809 Squarefree numbers k such that 6*k - 1 and 6*k + 1 are twin primes.

Table of values

List of values

A283809 Squarefree numbers k such that 6k - 1 and 6k + 1 are twin primes.

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	10
7	17
8	23
9	30
10	33
11	38
12	47
13	58
14	70
15	77
16	87
17	95
18	103
19	107
20	110
21	137
22	138
23	143
24	170
25	177
26	182
27	205
28	213
29	215
30	217
31	238
32	247
33	278
34	283
35	287
36	298
37	313
38	322
39	347
40	355
41	357
42	373
43	385
44	390
45	397
46	443
47	455
48	465
49	467
50	542
51	543
52	555
53	562
54	565
55	577
56	590
57	593
58	597
59	642
60	653
61	655
62	667
63	670
64	682