OFFSET
1,1
COMMENTS
Except for p=2, the sum of a prime and its reversed is even, therefore such a sum, divided by 2, is an integer.
All palindromic primes belong to this sequence since reverse(p)=p.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..5000
EXAMPLE
a(15)=571 since 571+reverse(571)=571+175=746 and 746/2=373 is a prime
MATHEMATICA
Select[Prime[Range[1500]], PrimeQ[(#+IntegerReverse[#])/2]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 22 2019 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Carmine Suriano, Sep 05 2010
STATUS
approved