A339924 Numbers k such that 14^k - 3 is prime.

1, 2, 3, 10, 18, 19, 27, 122, 184, 347, 448, 542, 1685, 5618, 6208, 9867, 25522, 37688, 47067, 79195, 114592, 251797

Offset

1,2

Links

Table of n, a(n) for n=1..22.

Example

1 is a term since 14^1 - 3 = 11 is a prime.

Mathematica

Do[ If[ PrimeQ[ 14^n - 3], Print[n]], {n, 0, 300000}]

Prog

(PARI) is(n)=isprime(14^n - 3)

Crossrefs

Cf. A339923.

Sequence in context: A363430 A350913 A066915 * A333673 A070253 A147673

Adjacent sequences: A339921 A339922 A339923 * A339925 A339926 A339927

Keyword

nonn,more

Author

Paul Bourdelais, Dec 23 2020

Status

approved