A124518 - cp's OEIS frontend

A124518 Numbers k such that 10k-1 and 10k+1 are twin primes.

n	a(n)
1	3
2	6
3	15
4	18
5	24
6	27
7	42
8	57
9	60
10	66
11	81
12	102
13	105
14	123
15	129
16	132
17	162
18	195
19	213
20	231
21	234
22	255
23	273
24	279
25	297
26	300
27	312
28	330
29	333
30	336
31	339
32	354
33	393
34	402
35	405
36	423
37	426
38	465
39	480
40	501
41	510
42	528
43	552
44	564
45	585
46	588
47	609
48	627
49	630
50	636
51	645
52	657
53	666
54	669
55	678

[3, 6, 15, 18, 24, 27, 42, 57, 60, 66, 81, 102, 105, 123, 129, 132, 162, 195, 213, 231, 234, 255, 273, 279, 297, 300, 312, 330, 333, 336, 339, 354, 393, 402, 405, 423, 426, 465, 480, 501, 510, 528, 552, 564, 585, 588, 609, 627, 630, 636, 645, 657, 666, 669, 678]

cp's OEIS Frontend

A124518 Numbers k such that 10k-1 and 10k+1 are twin primes.

Table of values

List of values

n	a(n)
1	3
2	6
3	15
4	18
5	24
6	27
7	42
8	57
9	60
10	66
11	81
12	102
13	105
14	123
15	129
16	132
17	162
18	195
19	213
20	231
21	234
22	255
23	273
24	279
25	297
26	300
27	312
28	330
29	333
30	336
31	339
32	354
33	393
34	402
35	405
36	423
37	426
38	465
39	480
40	501
41	510
42	528
43	552
44	564
45	585
46	588
47	609
48	627
49	630
50	636
51	645
52	657
53	666
54	669
55	678

n	a(n)
1	3
2	6
3	15
4	18
5	24
6	27
7	42
8	57
9	60
10	66
11	81
12	102
13	105
14	123
15	129
16	132
17	162
18	195
19	213
20	231
21	234
22	255
23	273
24	279
25	297
26	300
27	312
28	330
29	333
30	336
31	339
32	354
33	393
34	402
35	405
36	423
37	426
38	465
39	480
40	501
41	510
42	528
43	552
44	564
45	585
46	588
47	609
48	627
49	630
50	636
51	645
52	657
53	666
54	669
55	678

n	a(n)
1	3
2	6
3	15
4	18
5	24
6	27
7	42
8	57
9	60
10	66
11	81
12	102
13	105
14	123
15	129
16	132
17	162
18	195
19	213
20	231
21	234
22	255
23	273
24	279
25	297
26	300
27	312
28	330
29	333
30	336
31	339
32	354
33	393
34	402
35	405
36	423
37	426
38	465
39	480
40	501
41	510
42	528
43	552
44	564
45	585
46	588
47	609
48	627
49	630
50	636
51	645
52	657
53	666
54	669
55	678