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A247166
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Numbers k such that 15^k+4 is prime.
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2
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OFFSET
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1,3
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COMMENTS
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No further terms up to 10000.
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LINKS
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MATHEMATICA
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a247166[n_Integer] := Select[Range[n], PrimeQ[15^# + 4] &]; a247166[10^4] (* Michael De Vlieger, Dec 03 2014 *)
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PROG
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(PARI) for(n=0, 1e5, if(ispseudoprime(15^n+4), print1(n, ", ")))
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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