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A062593
Numbers k such that 27^k - 26^k is prime.
1
2, 13, 157, 43117
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OFFSET
1,1
COMMENTS
Terms > 1000 are often only strong pseudoprimes.
a(5) > 10^5. -
Robert Price
, Aug 12 2012.
LINKS
Table of n, a(n) for n=1..4.
PROG
(PARI) is(n)=ispseudoprime(27^n-26^n) \\
Charles R Greathouse IV
, Jun 12 2017
CROSSREFS
Cf.
A000043
,
A057468
,
A059801
,
A059802
,
A062572
-
A062666
.
Sequence in context:
A366012
A297408
A316701
*
A347051
A291140
A192563
Adjacent sequences:
A062590
A062591
A062592
*
A062594
A062595
A062596
KEYWORD
nonn
,
hard
AUTHOR
Mike Oakes
, May 18 2001, May 19 2001
EXTENSIONS
a(4) from
Robert Price
, Aug 12 2012
STATUS
approved
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Last modified August 31 22:13 EDT 2024. Contains 375574 sequences. (Running on oeis4.)