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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

a(26) > 23033. - Jinyuan Wang, Dec 27 2019

LINKS

Table of n, a(n) for n=1..25.

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

Adjacent sequences:  A059807 A059808 A059809 * A059811 A059812 A059813

KEYWORD

nonn,more

AUTHOR

Robert G. Wilson v, Feb 24 2001

EXTENSIONS

a(21)-a(25) from Jinyuan Wang, Dec 27 2019

STATUS

approved

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Last modified August 13 08:34 EDT 2020. Contains 336442 sequences. (Running on oeis4.)