A217136 - OEIS

A217136

Numbers k such that 3^k + 8 is prime.

1, 2, 4, 5, 8, 13, 14, 20, 38, 44, 77, 88, 124, 152, 244, 557, 2429, 4382, 6268, 18488, 75097, 81998, 96460, 143497

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OFFSET

1,2

COMMENTS

a(25) > 2*10^5. - Robert Price, Sep 25 2013

LINKS

MATHEMATICA

Select[Range[0, 5000], PrimeQ[3^# + 8] &]

PROG

(PARI) for(n=1, 5*10^3, if(isprime(3^n+8), print1(n", ")))

CROSSREFS

KEYWORD

nonn

AUTHOR

EXTENSIONS

a(19)-a(24) from Robert Price, Sep 25 2013

STATUS

approved