A217354 Numbers n such that 8^n + 3 is prime.

1, 2, 4, 5, 6, 10, 28, 76, 130, 370, 568, 713, 789, 790, 1334, 1354, 1849, 2913, 5729, 5740, 5978, 6908, 10618, 11918, 12748, 13449, 40850, 68654, 78442, 121040, 159948, 228526

Offset: 1

Author

Vincenzo Librandi, Oct 02 2012

Keywords

• nonn

Comments

3*A217354 is a subsequence of A057732. - Bruno Berselli, Oct 02 2012

Crossrefs

Cf. A057732, A089437, A217353.

Programs

Mathematica

Select[Range[5000], PrimeQ[8^# + 3] &]

PARI

is(n)=ispseudoprime(8^n+3) \\ Charles R Greathouse IV, Feb 17 2017

Extensions

a(19)-a(32) are obtained from A057732; by Bruno Berselli, Oct 02 2012