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A114301
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Numbers n such that 2^n+3^n+5^n+7^n is a prime number.
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0
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OFFSET
| 1,2
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EXAMPLE
| 2^3+3^3+5^3+7^3 = 503 (prime), thus 3 is in the sequence.
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MATHEMATICA
| Do[If[PrimeQ[2^n+3^n+5^n+7^n], Print[n]], {n, 1, 5000}]
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CROSSREFS
| Sequence in context: A136372 A107706 A168591 * A192340 A098796 A120563
Adjacent sequences: A114298 A114299 A114300 * A114302 A114303 A114304
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KEYWORD
| hard,more,nonn
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AUTHOR
| Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Feb 05 2006
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EXTENSIONS
| One more term from Ryan Propper (rpropper(AT)stanford.edu), Mar 24 2006
One more term from Joao Carlos Leandro da Silva (zxawyh66(AT)yahoo.com), Jun 01 2009
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