A034816 - cp's OEIS frontend

A034816 Concatenations C1 and C2 are both prime (see the comment lines).

n	a(n)
0	9
1	51
2	63
3	117
4	123
5	157
6	183
7	213
8	217
9	219
10	257
11	263
12	321
13	327
14	333
15	423
16	441
17	473
18	541
19	597
20	621
21	687
22	693
23	723
24	777
25	879
26	909
27	987
28	1101
29	1143
30	1187
31	1387
32	1459
33	1551
34	1887
35	2127
36	2179
37	2193
38	2817
39	3197
40	3339
41	3513
42	3633
43	4029
44	4209
45	4429
46	4529
47	4557

[9, 51, 63, 117, 123, 157, 183, 213, 217, 219, 257, 263, 321, 327, 333, 423, 441, 473, 541, 597, 621, 687, 693, 723, 777, 879, 909, 987, 1101, 1143, 1187, 1387, 1459, 1551, 1887, 2127, 2179, 2193, 2817, 3197, 3339, 3513, 3633, 4029, 4209, 4429, 4529, 4557]

cp's OEIS Frontend

A034816 Concatenations C1 and C2 are both prime (see the comment lines).

Table of values

List of values