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A076481
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Primes of the form (3^n-1)/2.
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15
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OFFSET
| 1,1
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COMMENTS
| All primes p whose reciprocals belong to the middle-third Cantor set satisfy an equation of the form 2pK + 1 = 3^n. This sequence is the special case K = 1. See reference. [Christian Salas, Jul 4 2011]
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 1..9
Christian Salas, On Prime Reciprocals in the Cantor Set, arXiv:0906.0465v5 [math.NT]
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MATHEMATICA
| Select[Table[(3^n-1)/2, {n, 0, 500}], PrimeQ] (* Vincenzo Librandi, Dec 09 2011 *)
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PROG
| (MAGMA) [a: n in [1..200] | IsPrime(a) where a is (3^n-1) div 2 ]; // Vincenzo Librandi, Dec 09 2011
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CROSSREFS
| The exponents n are in A028491. Cf. A075081.
Sequence in context: A095680 A128685 A201118 * A185834 A195890 A195520
Adjacent sequences: A076478 A076479 A076480 * A076482 A076483 A076484
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KEYWORD
| nonn
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AUTHOR
| Dean Hickerson (dean.hickerson(AT)yahoo.com), Oct 14 2002
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