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Search: id:A108258
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| A108258 |
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Consider primes p and q such that p = 3^k + 20 and q = 3^(k+1) + 20 for some k; sequence gives values of q. |
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1
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OFFSET
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0,1
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COMMENT
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It appears that these values are merely conjectures. - N. J. A. Sloane (njas(AT)research.att.com), Jun 30 2005
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EXAMPLE
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3^1 + 20 = 23, 3^2 + 20 = 29.
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PROGRAM
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(PARI) g(m, n, b) = { for(x=0, n, y=m+b^x+b%2; z=m+b^(x+1)+b%2; if(isprime(y)&isprime(z), print1(z", ") ) ) }
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CROSSREFS
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Sequence in context: A119891 A106754 A063642 this_sequence A142728 A042947 A134555
Adjacent sequences: A108255 A108256 A108257 this_sequence A108259 A108260 A108261
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KEYWORD
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nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Jun 29 2005
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