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Search: id:A114301
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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
1
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OFFSET
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1,2
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COMMENT
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Next term, if exists is bigger than 5000.
No more terms through 10^4. - Ryan Propper (rpropper(AT)stanford.edu), Mar 24 2006
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EXAMPLE
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2^3+3^3+5^3+7^3 = 503 (prime), thus 3 is in the sequence.
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MATHEMATICA
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Do[If[PrimeQ[2^n+3^n+5^n+7^n], Print[n]], {n, 1, 5000}]
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CROSSREFS
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Sequence in context: A051381 A136372 A107706 this_sequence A098796 A120563 A117844
Adjacent sequences: A114298 A114299 A114300 this_sequence A114302 A114303 A114304
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KEYWORD
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hard,more,nonn
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AUTHOR
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Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Feb 05 2006
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EXTENSIONS
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One more term from Ryan Propper (rpropper(AT)stanford.edu), Mar 24 2006
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