A219618 Numbers k such that 3^k + 100 is prime.

0, 1, 2, 3, 4, 6, 7, 8, 10, 18, 24, 26, 54, 63, 90, 91, 97, 156, 172, 230, 262, 344, 406, 435, 556, 630, 644, 667, 978, 1178, 1189, 1645, 1768, 2362, 2578, 2701, 2724, 2804, 2928, 3082, 3202, 3276, 4429, 12036, 15280, 19212, 19642, 21250, 25224, 37674, 52946, 66972

Offset

1,3

Links

Table of n, a(n) for n=1..52.

Mathematica

Select[Range[5000], PrimeQ[3^# + 100] &]

Prog

(PARI) is(n)=ispseudoprime(3^n+100) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Cf. A176929 (associated primes).

Sequence in context: A091199 A093452 A082103 * A328592 A175413 A192048

Adjacent sequences: A219615 A219616 A219617 * A219619 A219620 A219621

Keyword

nonn

Author

Vincenzo Librandi, Dec 01 2012

Extensions

a(44)-a(50) from Michael S. Branicky, Jul 14 2023

a(1)=0 inserted and a(51)-a(52) from Michael S. Branicky, Oct 24 2024

Status

approved