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A178835
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Primes of the form 19 * 2^n - 1.
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1
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37, 151, 607, 39845887, 41781441855487, 10696049115004927, 11760430373211112611541680127, 206891679087930585785731761318515072565247, 52964269846510229961147330897539858576703487, 888592995497188974267840378291500075950806986129407
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OFFSET
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1,1
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COMMENTS
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Main entry for this sequence is A001775.
Also primes of the form 38 * 4^n - 1, since even-numbered exponents yield numbers divisible by three.
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..20
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MATHEMATICA
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Select[19*2^Range[140]-1, PrimeQ] (* Harvey P. Dale, Mar 07 2014 *)
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PROG
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(MAGMA) [a: n in [0..250] | IsPrime(a) where a is (19 * 2^n - 1)]; // Vincenzo Librandi, Mar 08 2014
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CROSSREFS
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Sequence in context: A096700 A158596 A142688 * A250942 A250943 A142197
Adjacent sequences: A178832 A178833 A178834 * A178836 A178837 A178838
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KEYWORD
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nonn
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AUTHOR
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Kevin Batista (kevin762401(AT)yahoo.com), Jun 16 2010
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EXTENSIONS
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Edited by Charles R Greathouse IV, Aug 29 2010
Edited by Charles R Greathouse IV, Sep 02 2010
More terms from Harvey P. Dale, Mar 07 2014
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STATUS
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approved
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