cp's OEIS Frontend

A247958 Numbers n such that 35^n + 2 is prime.

%I A247958 #36 Sep 08 2022 08:46:10
%S A247958 0,1,15,83,1457,3959,5351,5355,41359,50327,54435
%N A247958 Numbers n such that 35^n + 2 is prime.
%C A247958 After 0, all terms are odd. - _Bruno Berselli_, Oct 01 2014
%C A247958 a(12) > 2*10^5. - _Robert Price_, Mar 21 2015
%H A247958 Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=35%5En%2B2&amp;action=Search">PRP Top Records, Search for 35^n+2</a>.
%p A247958 A247958:=n->`if`(isprime(35^n+2),n,NULL): seq(A247958(n), n=0..1000); # _Wesley Ivan Hurt_, Sep 30 2014
%t A247958 Select[Range[0, 10000], PrimeQ[35^# + 2] &]
%o A247958 (Magma) [n: n in [0..1000]| IsPrime(35^n+2)];
%o A247958 (PARI) is(n)=ispseudoprime(35^n+2) \\ _Charles R Greathouse IV_, Jun 13 2017
%Y A247958 Cf. similar sequences listed in A247957.
%K A247958 nonn,more
%O A247958 1,3
%A A247958 _Vincenzo Librandi_, Sep 28 2014
%E A247958 a(9)-a(11) from _Robert Price_, Mar 21 2015