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A177026
Primes of the form 4^n*(2^n-1)+1.
0
5, 449, 144114913197948929, 5070602400617769700807459995649, 11417981541647673977863886842678355104249151489
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OFFSET
1,1
COMMENTS
a(6) has 288 digits.
LINKS
Table of n, a(n) for n=1..5.
FORMULA
a(n) = 8^
A098856
(n)-4^
A098856
(n)+1.
PROG
(Magma)[a: n in [0..350]|IsPrime(a) where a is 8^n-4^n+1^n]
CROSSREFS
Cf.
A098856
,
A155629
Sequence in context:
A317345
A333263
A212042
*
A300544
A055305
A300971
Adjacent sequences:
A177023
A177024
A177025
*
A177027
A177028
A177029
KEYWORD
nonn
,
less
AUTHOR
Vincenzo Librandi
, Dec 09 2010
STATUS
approved
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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)