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A217492
Numbers k such that 9^k + 10 is prime.
1
0, 1, 3, 4, 9, 18, 49, 57, 67, 69, 106, 126, 258, 583, 1221, 1366, 4311, 11361, 12621, 14964, 16017, 22467, 25434, 45094, 51051, 89113
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
Sequence in context: A103295 A352134 A304257 * A374965 A178784 A192288
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