A165446 Primes p such that (p reversed)+2 is a prime.

3, 5, 11, 17, 53, 59, 71, 101, 113, 137, 173, 191, 503, 509, 521, 557, 563, 569, 587, 593, 599, 701, 719, 743, 773, 941, 947, 971, 1019, 1031, 1049, 1109, 1163, 1277, 1283, 1301, 1319, 1373, 1409, 1427, 1433, 1439, 1451, 1493, 1511, 1523, 1571, 1583, 1601

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Example

17 is in the sequence because 71+2=73 prime; 971 is in the sequence because 179+2=181 prime.

Mathematica

Select[Prime[Range[2, 1700]], PrimeQ[FromDigits[Reverse[IntegerDigits[#]]] + 2]&](* Vincenzo Librandi, Sep 15 2013 *)

Prog

(Magma) [p: p in PrimesInInterval(2, 400) | IsPrime(q+2) where q is Seqint(Reverse(Intseq(p)))]; // Vincenzo Librandi, Sep 15 2013

Crossrefs

Sequence in context: A147251 A146473 A282961 * A167466 A284144 A283913

Adjacent sequences: A165443 A165444 A165445 * A165447 A165448 A165449

Keyword

nonn,base

Author

Vincenzo Librandi, Sep 20 2009

Extensions

Edited by N. J. A. Sloane, Sep 20 2009

Status

approved