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A227170 Numbers n such that (16^n + 15^n)/31 is prime. 4
3, 5, 13, 1439, 1669, 37691 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
All terms are prime.
a(7) > 10^5. - Robert Price, Aug 26 2013
LINKS
Table of n, a(n) for n=1..6.
PROG
(PARI) is(n)=ispseudoprime((16^n+15^n)/31) \\ Charles R Greathouse IV, May 22 2017
CROSSREFS
Cf. A000978, A057469, A128066, A128335, A128336, A187805, A181141, A187819, A217095.
Sequence in context: A200769 A128341 A177007 * A028942 A278314 A289622
Adjacent sequences: A227167 A227168 A227169 * A227171 A227172 A227173
KEYWORD
hard,nonn,more
AUTHOR
Jean-Louis Charton, Jul 03 2013
STATUS
approved

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Last modified May 16 13:17 EDT 2024. Contains 372552 sequences. (Running on oeis4.)