A084671 - cp's OEIS frontend

A084671 Primes such that the decimal concatenation of prime(n) and n is prime.

n	a(n)
1	5
2	23
3	67
4	73
5	157
6	307
7	389
8	419
9	449
10	587
11	661
12	751
13	1051
14	1229
15	1297
16	1303
17	1327
18	1823
19	1913
20	1999
21	2131
22	2179
23	2207
24	2239
25	2371
26	2689
27	2699
28	3067
29	3433
30	3593
31	3623
32	3719
33	3919
34	3943
35	4001
36	4073
37	4229
38	4241
39	4397
40	4591
41	4733
42	4919
43	4957
44	4987
45	5393
46	5449
47	5503

[5, 23, 67, 73, 157, 307, 389, 419, 449, 587, 661, 751, 1051, 1229, 1297, 1303, 1327, 1823, 1913, 1999, 2131, 2179, 2207, 2239, 2371, 2689, 2699, 3067, 3433, 3593, 3623, 3719, 3919, 3943, 4001, 4073, 4229, 4241, 4397, 4591, 4733, 4919, 4957, 4987, 5393, 5449, 5503]

cp's OEIS Frontend

A084671 Primes such that the decimal concatenation of prime(n) and n is prime.

Table of values

List of values