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 A339923 Numbers k such that 14^k + 3 is prime. 1
 1, 2, 9, 24, 42, 74, 221, 620, 14064, 36697, 152048, 384558 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE 1 is a term since 14^1 + 3 = 17 is a prime. MATHEMATICA Do[ If[ PrimeQ[ 14^n + 3], Print[n]], {n, 0, 200000}] PROG (PARI) is(n)=isprime(14^n + 3) CROSSREFS Cf. A339924. Sequence in context: A323807 A075714 A101583 * A204556 A185669 A294872 Adjacent sequences:  A339920 A339921 A339922 * A339924 A339925 A339926 KEYWORD nonn,more AUTHOR Paul Bourdelais, Dec 23 2020 EXTENSIONS a(12) corresponds to a probable prime discovered by Paul Bourdelais, Jan 06 2021 STATUS approved

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Last modified September 23 10:55 EDT 2021. Contains 347612 sequences. (Running on oeis4.)