A243886 - cp's OEIS frontend

A243886 Primes p = prime(n): such that p.n and n.p both are prime, where (.) indicates concatenation.

n	a(n)
1	661
2	1051
3	1999
4	2179
5	3433
6	3593
7	3719
8	4073
9	4591
10	4733
11	5449
12	5503
13	6079
14	6481
15	7109
16	7211
17	7489
18	8293
19	8513
20	9901
21	10273
22	10529
23	11821
24	12721
25	14107
26	14591
27	14879
28	15263
29	15877
30	18149
31	19559
32	22027
33	22129
34	22571
35	23339
36	24527
37	25357
38	26881
39	27337
40	34259

[661, 1051, 1999, 2179, 3433, 3593, 3719, 4073, 4591, 4733, 5449, 5503, 6079, 6481, 7109, 7211, 7489, 8293, 8513, 9901, 10273, 10529, 11821, 12721, 14107, 14591, 14879, 15263, 15877, 18149, 19559, 22027, 22129, 22571, 23339, 24527, 25357, 26881, 27337, 34259]

cp's OEIS Frontend

A243886 Primes p = prime(n): such that p.n and n.p both are prime, where (.) indicates concatenation.

Table of values

List of values