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Search: id:A058037
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| A058037 |
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Numbers n such that 3^n - n is prime. |
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+0
1
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| 1, 2, 8, 20, 40, 104, 110, 208, 472, 832, 1982, 25628
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OFFSET
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1,2
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COMMENT
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Except for the first term all terms are of the form 6k+2 or 6k+4. There are no further terms up to 34500. - Farideh Firoozbakht (mymontain(AT)yahoo.com), Jul 17 2005
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MATHEMATICA
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Do[ If[ PrimeQ[ 3^n - n ], Print[ n ] ], {n, 0, 3000} ]
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CROSSREFS
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Sequence in context: A032633 A007290 A049031 this_sequence A048096 A072250 A057566
Adjacent sequences: A058034 A058035 A058036 this_sequence A058038 A058039 A058040
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KEYWORD
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nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 16 2000
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EXTENSIONS
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25628 from Farideh Firoozbakht (mymontain(AT)yahoo.com), Jul 17 2005
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