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A039687 Primes of form 6*2^n+1. 6
7, 13, 97, 193, 769, 12289, 786433, 3221225473, 206158430209, 6597069766657, 221360928884514619393, 2353913150770005286438421033702874906038383291674012942337 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..12.

MATHEMATICA

Select[Table[6 2^n+1, {n, 0, 250}], PrimeQ] [From Harvey P. Dale, Dec. 17, 2010]

CROSSREFS

Sequence in context: A177952 A132373 A110293 * A001544 A202152 A136720

Adjacent sequences:  A039684 A039685 A039686 * A039688 A039689 A039690

KEYWORD

nonn

AUTHOR

Felice Russo

EXTENSIONS

For more terms see A002253.

STATUS

approved

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Last modified September 17 17:29 EDT 2014. Contains 246866 sequences.