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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

Table of n, a(n) for n=1..12.

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.)