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A119386
Numbers k such that 2^(2*k)-(2*k-1) is prime.
1
0, 1, 2, 3, 8, 9, 27, 29, 50, 60, 252, 651, 1617, 7374, 8051, 11391, 17328, 32382, 35433
OFFSET
1,3
COMMENTS
a(18) > 30000, if it exists. - Amiram Eldar, Dec 01 2021
MATHEMATICA
Select[Range[0, 2000], PrimeQ[2^(2#)-(2#-1)]&] Harvey P. Dale, May 20 2012
PROG
(PARI) for(x=0, 1000, if(isprime(2^(2*x)-(2*x-1)), print1(x, ", ")))
CROSSREFS
Cf. A100102.
Sequence in context: A085453 A271394 A030439 * A162219 A140484 A087034
KEYWORD
nonn,more
AUTHOR
Jorge Coveiro, Jul 25 2006
EXTENSIONS
a(14)-a(17) from Amiram Eldar, Dec 01 2021
a(18)-a(19) from Michael S. Branicky, May 15 2023
STATUS
approved