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A136027
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Smallest prime of the form (p-2n)/(2n+1) with p prime.
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35
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3, 3, 5, 5, 3, 7, 3, 3, 5, 3, 5, 5, 3, 5, 13, 3, 3, 11, 5, 3, 5, 3, 5, 5, 19, 3, 7, 3, 5, 7, 3, 5, 5, 11, 3, 13, 5, 3, 7, 7, 3, 5, 3, 17, 7, 5, 3, 11, 5, 23, 5, 3, 5, 5, 3, 5, 7, 3, 11, 7, 3, 3, 5, 5, 3, 5, 5, 3, 11, 3, 3, 13, 3, 11, 11, 7, 3, 5, 5, 3, 5, 3, 11, 5, 3, 3, 5, 5
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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a(1)=3 because 3 is smallest prime of the form (p-2)/3; in this case prime(k)=11.
a(2)=3 because 3 is smallest prime of the form (p-4)/5; in this case prime(k)=19.
a(3)=5 because 5 is smallest prime of the form (p-6)/7; in this case prime(k)=41.
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MATHEMATICA
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a = {}; Do[k = 1; While[ !PrimeQ[(Prime[k] - 2n)/(2n + 1)], k++ ]; AppendTo[a, (Prime[k] - 2n)/(2n + 1)], {n, 1, 100}]; a
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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