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A182327 Primes of the form 3^k + k + 1. 2
2, 5, 31, 14348923, 2954312706550833698689, 66555937033867822607895549241096482953017615834735226281, 7282483350946404208076885500996745047522350034970917293604274649554310785227 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..7.

MATHEMATICA

Select[Table[3^n + n + 1, {n, 0, 150}], PrimeQ] (* T. D. Noe, Apr 25 2012 *)

CROSSREFS

Cf. A061421, A301632.

Sequence in context: A295391 A259644 A132527 * A032504 A041397 A042811

Adjacent sequences:  A182324 A182325 A182326 * A182328 A182329 A182330

KEYWORD

nonn

AUTHOR

Alex Ratushnyak, Apr 25 2012

EXTENSIONS

a(7) from Seiichi Manyama, Mar 25 2018

STATUS

approved

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Last modified August 5 22:07 EDT 2020. Contains 336214 sequences. (Running on oeis4.)