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A217130 Numbers n such that 7^n + 6 is prime. 10
0, 1, 3, 16, 36, 244, 315, 2577, 9500, 17596, 25551, 32193, 32835, 36504, 75136 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
a(16) > 10^5. - Robert Price, Jan 24 2014
LINKS
MATHEMATICA
Select[Range[0, 5000], PrimeQ[7^# + 6] &]
PROG
(PARI) for(n=1, 5000, if(isprime(7^n+6), print1(n", ")))
(Magma) /* The code produces the sequence up to 315: */ [n: n in [0..2000] | IsPrime(7^n+6)];
CROSSREFS
Sequence in context: A359559 A076153 A031302 * A173390 A173891 A066875
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Oct 01 2012
EXTENSIONS
a(9)-a(15) from Robert Price, Jan 24 2014
STATUS
approved

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Last modified March 18 22:50 EDT 2024. Contains 370951 sequences. (Running on oeis4.)