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A128031
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Numbers n such that (17^n - 3^n)/14 is prime.
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20
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OFFSET
| 1,1
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COMMENTS
| All terms are primes.
No other terms <100,000.
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MATHEMATICA
| k=14; Select[ Prime[ Range[1, 200] ], PrimeQ[ ((k+3)^# - 3^#)/k ]& ]
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CROSSREFS
| Cf. A028491 = numbers n such that (3^n - 1)/2 is prime.
Cf. A057468 = numbers n such that 3^n - 2^n is prime.
Cf. A059801 = numbers n such that 4^n - 3^n is prime.
Cf. A121877 = numbers n such that (5^n - 3^n)/2 is a prime.
Cf. A128024, A128025, A128026, A128027, A128028, A128029, A128030, A128032.
Sequence in context: A080306 A036448 A128346 * A194128 A127995 A119141
Adjacent sequences: A128028 A128029 A128030 * A128032 A128033 A128034
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KEYWORD
| hard,more,nonn
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AUTHOR
| Alexander Adamchuk (alex(AT)kolmogorov.com), Feb 11 2007
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EXTENSIONS
| a(5)=23029 from Robert Price (pamandbobprice(AT)yahoo.com), Nov 03 2011
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