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A242196 Numbers k such that k*12^k + 1 is prime. 2
1, 8, 247, 3610, 4775, 19789, 187895 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

G. Loeh, Generalized Cullen primes

MATHEMATICA

Select[Range[2300], PrimeQ[# 12^# + 1] &]

PROG

(MAGMA) [n: n in [0..2300] | IsPrime(n*12^n+1)]

(PARI) is(n)=ispseudoprime(n*12^n+1) \\ Charles R Greathouse IV, Jun 06 2017

CROSSREFS

Cf. similar sequences listed in A242176.

Sequence in context: A062481 A053089 A090241 * A316802 A299648 A219269

Adjacent sequences:  A242193 A242194 A242195 * A242197 A242198 A242199

KEYWORD

nonn,more

AUTHOR

Vincenzo Librandi, May 08 2014

EXTENSIONS

a(4)- a(7) from Loeh's list (see Links) - Bruno Berselli, May 08 2014

STATUS

approved

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Last modified January 25 19:09 EST 2020. Contains 331249 sequences. (Running on oeis4.)