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A173872 Primes of the form 12*2^n - 11. 1
13, 37, 181, 373, 757, 3061, 6133, 12277, 196597, 1572853, 25165813, 805306357, 3221225461, 6442450933, 12884901877, 26388279066613, 3377699720527861, 1813388729421943762059253 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..33

MAPLE

select(isprime, [seq(12*2^n-11, n=1..1000)]); # Robert Israel, Aug 20 2014

MATHEMATICA

Select[NestList[2#+11&, 13, 80], PrimeQ] (* Harvey P. Dale, Jun 18 2013 *)

CROSSREFS

Cf. A139697

Sequence in context: A036570 A147615 A298683 * A155241 A155222 A155283

Adjacent sequences:  A173869 A173870 A173871 * A173873 A173874 A173875

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Mar 05 2010

STATUS

approved

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Last modified April 21 07:53 EDT 2019. Contains 322327 sequences. (Running on oeis4.)