OFFSET
1,1
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..1000
Eric Weisstein's World of Mathematics, Palindromic Prime
EXAMPLE
11311 is in the sequence because 11311 is a palindrome, 11311 is a 1367-th prime number and 1367 is prime.
MATHEMATICA
Select[Prime@ Prime@ Range@ 20000, PalindromeQ] (* modified by Robert G. Wilson v, Jan 09 2017 *)
PROG
(Python)
from itertools import chain, count, islice
from sympy import isprime, primepi
def A280876_gen(): # generator of terms
return filter(lambda n:isprime(n) and isprime(primepi(n)), chain.from_iterable(chain((int((s:=str(d))+s[-2::-1]) for d in range(10**l, 10**(l+1))), (int((s:=str(d))+s[::-1]) for d in range(10**l, 10**(l+1)))) for l in count(0)))
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Ilya Gutkovskiy, Jan 09 2017
STATUS
approved