A173872 Primes of the form 12*2^n - 11.

13, 37, 181, 373, 757, 3061, 6133, 12277, 196597, 1572853, 25165813, 805306357, 3221225461, 6442450933, 12884901877, 26388279066613, 3377699720527861, 1813388729421943762059253

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: A147615 A371512 A298683 * A155241 A155222 A155283

Adjacent sequences: A173869 A173870 A173871 * A173873 A173874 A173875

Keyword

nonn

Author

Vincenzo Librandi, Mar 05 2010

Status

approved