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Search: id:A140331
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| A140331 |
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Smallest k such that 3^(3^n) - k is prime. |
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+0
1
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OFFSET
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1,1
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COMMENT
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This is to 3 as A058220 is to 2.
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EXAMPLE
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a(4) = 10 because 3^(3^4) - 10 = 443426488243037769948249630619149892793 is prime.
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CROSSREFS
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Cf. A058220.
Sequence in context: A030211 A134461 A058167 this_sequence A095896 A123670 A121667
Adjacent sequences: A140328 A140329 A140330 this_sequence A140332 A140333 A140334
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KEYWORD
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more,nonn
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AUTHOR
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Jonathan Vos Post (jvospost3(AT)gmail.com), May 26 2008
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EXTENSIONS
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a(5)-a(8) from Cino Hilliard (hillcino368(AT)hotmail.com), Jun 02 2008
a(9)-a(10) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 13 2008
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