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A108264 Consider primes p and q such that p = 2^k + 9 and q = 2^(k+1) + 9 for some k; sequence gives values of p. 1
11, 13, 41, 73, 521 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

No additional terms up to k=5000. - Harvey P. Dale, Mar 08 2015

LINKS

Table of n, a(n) for n=1..5.

MATHEMATICA

2^#+9&/@(Flatten[Position[Partition[If[PrimeQ[#], 1, 0]&/@(2^Range[10]+ 9), 2, 1], {1, 1}]]) (* Harvey P. Dale, Mar 08 2015 *)

PROG

(PARI) g(m, n, b) = { for(x=0, n, y=m+b^x+b%2; z=m+b^(x+1)+b%2; if(isprime(y)&isprime(z), print1(y", ") ) ) }

CROSSREFS

Cf. A108265.

Sequence in context: A132241 A329175 A045467 * A023268 A154292 A188386

Adjacent sequences:  A108261 A108262 A108263 * A108265 A108266 A108267

KEYWORD

nonn

AUTHOR

Cino Hilliard, Jun 29 2005

STATUS

approved

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Last modified September 17 16:00 EDT 2021. Contains 347478 sequences. (Running on oeis4.)