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A057469
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Prime numbers n such that (2^n + 3^n)/5 is prime.
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16
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3, 7, 11, 83, 149, 223, 599, 647, 1373, 8423, 149497, 388897
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| Do[ If[ PrimeQ[ n ], If[ PrimeQ[ (3^n + 2^n)/5 ], Print[ n ] ] ], {n, 0, 6270} ]
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CROSSREFS
| Primes of form (3^n + 2^n)/5 are listed in A127908.
Sequence in context: A125220 A016081 A105762 * A082598 A082599 A123259
Adjacent sequences: A057466 A057467 A057468 * A057470 A057471 A057472
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KEYWORD
| nonn
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 09 2000
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EXTENSIONS
| More terms from Kamil Duszenko (kdusz(AT)wp.pl), Apr 11 2003
Definition corrected by Alexander Adamchuk, Feb 06 2007
New term 149497 found by Jean-Louis Charton on Oct 14 2010 corresponding to a probable prime with 71328 digits. Jean-Louis Charton (chartonjl(AT)wanadoo.fr), Oct 18 2010
New term 388897 found by Jean-Louis Charton in Sep 18 2011 corresponding to a probable prime with 185551 digits.
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