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Search: id:A122727
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A122727 Numbers n such that abs(9^n - 2^11) is prime. +0
1
1, 3, 4, 6, 15, 153, 159, 166, 832, 1123, 1294 (list; graph; listen)
OFFSET

1,2

LINKS

C. Pomerance, Science News reference.

EXAMPLE

For n = 1, abs(9^1-2^11) = 2039 which is prime. So 1 is the first entry.

PROGRAM

(PARI) g(n) = for(x=1, n, y=abs(9^x-2^11); if(ispseudoprime(y), print1(x", ")))

CROSSREFS

Sequence in context: A049892 A063477 A129827 this_sequence A089249 A092933 A122849

Adjacent sequences: A122724 A122725 A122726 this_sequence A122728 A122729 A122730

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard (hillcino368(AT)gmail.com), Sep 23 2006

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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