A243460 Primes p such that (p reversed)-7 is also a prime.

41, 47, 83, 401, 419, 431, 443, 449, 461, 467, 479, 617, 641, 647, 653, 677, 683, 857, 881, 4001, 4007, 4049, 4073, 4079, 4127, 4133, 4157, 4211, 4253, 4289, 4373, 4397, 4421, 4457, 4463, 4583, 4643, 4703, 4751, 4787, 4793, 4799, 4817, 4871, 4919, 4967, 6029

Offset

1,1

Links

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

Mathematica

Select[Prime[Range[4, 7000]], PrimeQ[FromDigits[Reverse[IntegerDigits[#]]] - 7] &]

Prog

(Magma) [p: p in PrimesInInterval(6, 7000) | IsPrime(q-7) where q is Seqint(Reverse(Intseq(p)))];

Crossrefs

Cf. similar sequences listed in A243457.

Sequence in context: A136294 A180547 A329446 * A186280 A039328 A043151

Adjacent sequences: A243457 A243458 A243459 * A243461 A243462 A243463

Keyword

nonn,base

Author

Vincenzo Librandi, Jun 05 2014

Status

approved