A034814 - cp's OEIS frontend

A034814 Concatenations C1 and C2 are both prime (see the comment lines).

n	a(n)
1	9
2	51
3	63
4	87
5	111
6	123
7	153
8	177
9	207
10	211
11	239
12	263
13	273
14	289
15	327
16	333
17	343
18	359
19	407
20	471
21	489
22	497
23	513
24	541
25	597
26	621
27	651
28	659
29	663
30	681
31	687
32	693
33	697
34	747
35	753
36	793
37	819
38	831
39	869
40	909
41	977
42	987
43	1027
44	1041
45	1089
46	1131
47	1143
48	1239
49	1491
50	1611

[9, 51, 63, 87, 111, 123, 153, 177, 207, 211, 239, 263, 273, 289, 327, 333, 343, 359, 407, 471, 489, 497, 513, 541, 597, 621, 651, 659, 663, 681, 687, 693, 697, 747, 753, 793, 819, 831, 869, 909, 977, 987, 1027, 1041, 1089, 1131, 1143, 1239, 1491, 1611]

cp's OEIS Frontend

A034814 Concatenations C1 and C2 are both prime (see the comment lines).

Table of values

List of values