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A062606
Numbers k such that 40^k - 39^k is prime.
0
2, 37, 61, 227, 1163, 2473
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OFFSET
1,1
COMMENTS
Terms greater than 1000 are often only strong pseudoprimes.
No other terms less than 10^5. -
Robert Price
, Jul 24 2012
LINKS
Table of n, a(n) for n=1..6.
PROG
(PARI) is(n)=ispseudoprime(40^n-39^n) \\
Charles R Greathouse IV
, Jun 13 2017
CROSSREFS
Cf.
A000043
,
A057468
,
A059801
,
A059802
,
A062572
-
A062666
.
Sequence in context:
A199980
A084548
A063999
*
A282639
A099533
A107752
Adjacent sequences:
A062603
A062604
A062605
*
A062607
A062608
A062609
KEYWORD
nonn
,
hard
AUTHOR
Mike Oakes
, May 18 2001, May 19 2001
STATUS
approved
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Last modified July 14 20:49 EDT 2024. Contains 374323 sequences. (Running on oeis4.)