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Search: id:A089213
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| A089213 |
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Primes p such that either 3^p-2 or 3^p+2 is prime. |
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OFFSET
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1,1
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EXAMPLE
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At p=2,3,139 3^p+2 is prime,
at p=2,5,37,41,317,541,2521 3^p-2 is prime.
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MATHEMATICA
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Select[Union[A014224, A051783], PrimeQ]
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CROSSREFS
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Cf. A014224, A051783.
Sequence in context: A109845 A041019 A041977 this_sequence A029499 A128026 A041443
Adjacent sequences: A089210 A089211 A089212 this_sequence A089214 A089215 A089216
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KEYWORD
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nonn
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AUTHOR
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Herman H. Rosenfeld (herm3(AT)pacbell.net), Dec 20 2003
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EXTENSIONS
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Edited by Zak Seidov (zakseidov(AT)yahoo.com), Aug 08 2006
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