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A145440 Primes of the form 8^n+9. 10
17, 73, 521, 262153, 1073741833, 144115188075855881, 73786976294838206473, 273406340597876490546562778389702670669146178861651554553221325801244124899921990402939147127881737 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

8^n+9 is prime for n= 1, 2, 3, 6, 10, 19, 22,..

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..9

EXAMPLE

For n=1, 8+9=17; n=2, 8^2+9=73; n=3, 8^3+9=521

MATHEMATICA

Select[8^Range[120]+9, PrimeQ]  [From Harvey P. Dale, Jan. 18, 2011]

PROG

(MAGMA) [a: n in [0..200] | IsPrime(a) where a is 8^n+9];

CROSSREFS

A subsequence of A104070. Cf. A057196.

Sequence in context: A201610 A201262 A146658 * A112013 A165691 A154419

Adjacent sequences:  A145437 A145438 A145439 * A145441 A145442 A145443

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Mar 11 2009

STATUS

approved

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Last modified October 24 04:04 EDT 2014. Contains 248491 sequences.