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A219618 Numbers n such that 3^n + 100 is prime. 1
1, 2, 3, 4, 6, 7, 8, 10, 18, 24, 26, 54, 63, 90, 91, 97, 156, 172, 230, 262, 344, 406, 435, 556, 630, 644, 667, 978, 1178, 1189, 1645, 1768, 2362, 2578, 2701, 2724, 2804, 2928, 3082, 3202, 3276, 4429 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..42.

MATHEMATICA

Select[Range[5000], PrimeQ[3^# + 100] &]

PROG

(PARI) is(n)=ispseudoprime(3^n+100) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A176929 (associated primes).

Sequence in context: A091199 A093452 A082103 * A051602 A175413 A192048

Adjacent sequences:  A219615 A219616 A219617 * A219619 A219620 A219621

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Dec 01 2012

STATUS

approved

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Last modified October 18 23:39 EDT 2019. Contains 328211 sequences. (Running on oeis4.)