A235150 Primes p such that (p reversed) + 9 is also a prime.

2, 23, 29, 41, 43, 47, 83, 89, 223, 239, 241, 257, 269, 271, 281, 293, 401, 443, 449, 461, 463, 467, 479, 811, 821, 823, 829, 839, 853, 859, 877, 881, 883, 887, 2003, 2027, 2039, 2053, 2081, 2089, 2113, 2129, 2131, 2137, 2161, 2179, 2221, 2237, 2251, 2269, 2281

Offset

1,1

Links

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

Example

83 is in the sequence because 38+9=47 is prime.

Mathematica

Select[Prime[Range[4000]], PrimeQ[FromDigits[Reverse[IntegerDigits[#]]] + 9]&]

Prog

(Magma) [p: p in PrimesUpTo(4000) | IsPrime(q+9) where q is Seqint(Reverse(Intseq(p)))];

Crossrefs

Cf. A165446, A166501, A167460, A167466, A167473.

Sequence in context: A156614 A355430 A226016 * A114549 A235148 A208325

Adjacent sequences: A235147 A235148 A235149 * A235151 A235152 A235153

Keyword

nonn,base

Author

Vincenzo Librandi, Jan 04 2014

Status

approved