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A050523
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Primes of form 7*2^n-1.
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1
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OFFSET
| 1,1
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LINKS
| Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime
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MATHEMATICA
| Select[Table[7*2^n-1, {n, 0, 200}] , PrimeQ] (* Jean-François Alcover, Mar 20 2011 *)
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CROSSREFS
| See A001771 for more terms.
Cf. A158795 [Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Mar 28 2009 ]
Sequence in context: A062127 A178559 A068120 * A160196 A158518 A201706
Adjacent sequences: A050520 A050521 A050522 * A050524 A050525 A050526
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KEYWORD
| nonn,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Dec 29 1999
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EXTENSIONS
| 13 inserted by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 01 2009
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