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A137236 Numbers k such that 13^k + 4 is prime. 3
0, 1, 2, 6, 10, 15, 94, 198, 219, 4543, 11511, 12638, 45606 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

a(14) > 10^5. - Tyler NeSmith, May 09 2021

LINKS

Table of n, a(n) for n=1..13.

Henri Lifchitz and Renaud Lifchitz, PRP Records.

PROG

(PARI) for(n=0, 300, if(isprime(13^n+4), print1(n", ")))

CROSSREFS

Sequence in context: A184426 A293408 A097022 * A124198 A032426 A220453

Adjacent sequences:  A137233 A137234 A137235 * A137237 A137238 A137239

KEYWORD

hard,more,nonn

AUTHOR

Jason Earls, Mar 08 2008

EXTENSIONS

a(13) from Lelio R. Paula contributed by Iain Fox, Nov 24 2017

STATUS

approved

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Last modified December 7 15:24 EST 2021. Contains 349581 sequences. (Running on oeis4.)