OFFSET
1,1
COMMENTS
If m is a term, then 10*m is another term. - Bernard Schott, Nov 20 2021
LINKS
Michael S. Branicky, Table of n, a(n) for n = 1..10000
MATHEMATICA
Rev[n_]:=FromDigits[Reverse[IntegerDigits[n]]]; Select[Range[332], !PrimeQ[#] && PrimeQ[Rev[#]]&] (* Jayanta Basu, May 01 2013 *)
PROG
(Python)
from sympy import isprime
def ok(n): return not isprime(n) and isprime(int(str(n)[::-1]))
print([k for k in range(333) if ok(k)]) # Michael S. Branicky, Nov 20 2021
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Oct 04 2002
EXTENSIONS
Corrected and extended by Sascha Kurz, Jan 20 2003
STATUS
approved