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A059746
Numbers k such that 3*2^k + 7 is prime.
2
1, 2, 3, 5, 6, 9, 10, 11, 19, 22, 30, 35, 41, 91, 101, 125, 261, 706, 750, 1315, 1629, 2082, 2979, 3029, 3077, 3950, 4097, 5491, 5746, 10761, 12946, 14770, 15642, 30006, 34157, 34722, 48499, 62862
OFFSET
1,2
COMMENTS
According to PRP Records, this sequence contains 131867, 164205, 185429, 232750, 256149, 295139, 315067, 368489. - Jason Yuen, Sep 02 2024
LINKS
Henri Lifchitz and Renaud Lifchitz, PRP Records.
MATHEMATICA
Do[ If[ PrimeQ[ 3*2^n + 7 ], Print[n] ], {n, 1, 3000} ]
PROG
(PARI) is(n)=ispseudoprime(3*2^n+7) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Cf. A059747.
Sequence in context: A166687 A189224 A018762 * A362030 A024620 A232527
KEYWORD
nonn,more
AUTHOR
Robert G. Wilson v, Feb 10 2001
EXTENSIONS
More terms from Robert G. Wilson v, Jan 28 2003
a(33) from Michael S. Branicky, Jan 09 2023
a(34) from Michael S. Branicky, Jan 12 2023
a(35)-a(37) from Michael S. Branicky, Apr 06 2023
a(38) from Michael S. Branicky, Jul 31 2024
STATUS
approved