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A217353
Numbers k such that 8^k - 3 is prime.
3
1, 2, 3, 4, 8, 50, 58, 71, 112, 1079, 1318, 2252, 3524, 4800, 5560, 6919, 11484, 12184, 41099, 94711, 375460, 449248
OFFSET
1,2
COMMENTS
3*A217353 is a subsequence of A050414. - Bruno Berselli, Oct 02 2012
MATHEMATICA
Select[Range[5000], PrimeQ[8^# - 3] &]
PROG
(PARI) is(n)=ispseudoprime(8^n-3) \\ Charles R Greathouse IV, May 22 2017
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Vincenzo Librandi, Oct 02 2012
EXTENSIONS
a(15)-a(17), a(19)-a(20) using A050414 by Bruno Berselli, Oct 02 2012
a(18), a(21)-a(22) using A050414 by Michael S. Branicky, Sep 15 2024
STATUS
approved