A339923 Numbers k such that 14^k + 3 is prime.
1, 2, 9, 24, 42, 74, 221, 620, 14064, 36697, 152048, 384558
Offset: 1
Examples
1 is a term since 14^1 + 3 = 17 is a prime.
Crossrefs
Cf. A339924.
Programs
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Mathematica
Do[ If[ PrimeQ[ 14^n + 3], Print[n]], {n, 0, 200000}] -
PARI
is(n)=isprime(14^n + 3)
Extensions
a(12) corresponds to a probable prime discovered by Paul Bourdelais, Jan 06 2021