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A143252
Numbers n such that 2*41^n + 1 is prime.
0
0, 1, 819, 1449, 1677, 13319
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OFFSET
1,3
COMMENTS
Primes found and proved by PrimeForm. No more terms up to 30000.
LINKS
Table of n, a(n) for n=1..6.
PROG
(PARI) is(n)=ispseudoprime(2*41^n+1) \\
Charles R Greathouse IV
, Jun 13 2017
CROSSREFS
Cf.
A141802
.
Sequence in context:
A356414
A020445
A356416
*
A200565
A212609
A212612
Adjacent sequences:
A143249
A143250
A143251
*
A143253
A143254
A143255
KEYWORD
hard
,
nonn
AUTHOR
Rick L. Shepherd
, Aug 02 2008
STATUS
approved
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Last modified May 12 18:22 EDT 2024. Contains 372494 sequences. (Running on oeis4.)
