A245072 Primes whose reversal + 1 is not a prime.

3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 281, 293, 307, 311, 313

Offset

1,1

Comments

Complement of A167215.

Links

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

Mathematica

Select[Prime[Range[700]], ! PrimeQ[FromDigits[Reverse[IntegerDigits[#]]] + 1] &]

Prog

(Magma) [p: p in PrimesInInterval(2, 400) |not IsPrime(q+1) where q is Seqint(Reverse(Intseq(p)))];

Crossrefs

Cf. A167215.

Sequence in context: A038134 A215697 A322184 * A338134 A138980 A191378

Adjacent sequences: A245069 A245070 A245071 * A245073 A245074 A245075

Keyword

nonn,base

Author

Vincenzo Librandi, Jul 11 2014

Status

approved