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A145440
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Primes of the form 8^n+9.
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2
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17, 73, 521, 262153, 1073741833, 144115188075855881, 73786976294838206473, 273406340597876490546562778389702670669146178861651554553221325801244124899921990402939147127881737
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OFFSET
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1,1
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COMMENTS
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8^n+9 is prime for n= 1, 2, 3, 6, 10, 19, 22,..
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..9
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EXAMPLE
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For n=1, 8+9=17; n=2, 8^2+9=73; n=3, 8^3+9=521
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MATHEMATICA
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Select[8^Range[120]+9, PrimeQ] [From Harvey P. Dale, Jan. 18, 2011]
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PROG
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(MAGMA) [a: n in [0..200] | IsPrime(a) where a is 8^n+9];
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CROSSREFS
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A subsequence of A104070. Cf. A057196.
Sequence in context: A201610 A201262 A146658 * A112013 A165691 A154419
Adjacent sequences: A145437 A145438 A145439 * A145441 A145442 A145443
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KEYWORD
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nonn
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AUTHOR
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Vincenzo Librandi, Mar 11 2009
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STATUS
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approved
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