OFFSET
1,3
COMMENTS
Contains exactly the halved even terms of A217137.
MATHEMATICA
Select[Range[5000], PrimeQ[9^# + 10] &] (* Vincenzo Librandi, Oct 05 2012 *)
PROG
(PARI) is(n)=ispseudoprime(9^n+10) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
nonn,more,hard,changed
AUTHOR
Vincenzo Librandi, Oct 05 2012
EXTENSIONS
a(18)-a(26) added from the data at A217137 by Amiram Eldar, Jun 19 2022
STATUS
approved