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A245072
Primes whose reversal + 1 is not a prime.
1
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
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
KEYWORD
nonn,base
AUTHOR
Vincenzo Librandi, Jul 11 2014
STATUS
approved