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A057916
Numbers k such that 3*5^k + 2 is prime.
1
0, 1, 4, 5, 6, 10, 18, 30, 34, 53, 256, 304, 309, 400, 468, 766, 1470, 2125, 2238, 2404, 4708, 5884, 6264, 8676, 42346
OFFSET
1,3
COMMENTS
a(25) > 21230. - Jinyuan Wang, Dec 08 2019
MATHEMATICA
Do[ If[ PrimeQ[ 3*5^n + 2 ], Print[ n ] ], {n, 0, 2000} ]
PROG
(PARI) is(n)=ispseudoprime(3*5^n+2) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A079257 A001609 A101590 * A249853 A162415 A007606
KEYWORD
nonn,more
AUTHOR
Robert G. Wilson v, Nov 16 2000
EXTENSIONS
First term 0 inserted by Georg Fischer, Aug 01 2019
a(22)-a(24) from Jinyuan Wang, Dec 08 2019
a(25) from Michael S. Branicky, Jul 09 2024
STATUS
approved