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A059810
Numbers k such that 5*7^k + 6 is prime.
0
0, 1, 2, 3, 4, 12, 23, 66, 69, 98, 139, 235, 243, 253, 269, 283, 932, 1603, 3066, 5509, 7539, 8117, 8168, 15736, 22867
OFFSET
1,3
COMMENTS
a(26) > 23033. - Jinyuan Wang, Dec 27 2019
a(26) > 50000. - Michael S. Branicky, Jul 08 2024
MATHEMATICA
Do[ If[ PrimeQ[ 5*7^n + 6 ], Print[n] ], {n, 0, 5700} ]
PROG
(PARI) is(n)=ispseudoprime(5*7^n+6) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A243392 A239943 A295754 * A037397 A168047 A236371
KEYWORD
nonn,more
AUTHOR
Robert G. Wilson v, Feb 24 2001
EXTENSIONS
a(21)-a(25) from Jinyuan Wang, Dec 27 2019
STATUS
approved