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A090670
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Odd numbers k such that 2*k-3 is a prime of the form 4*j+3.
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2
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3, 5, 7, 11, 13, 17, 23, 25, 31, 35, 37, 41, 43, 53, 55, 65, 67, 71, 77, 83, 85, 91, 97, 101, 107, 113, 115, 121, 127, 133, 137, 143, 155, 157, 167, 175, 181, 185, 191, 193, 211, 217, 221, 223, 233, 235, 241, 245, 247, 251, 253, 263, 275, 283, 287, 295, 301, 305
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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REFERENCES
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M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988
Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997
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LINKS
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FORMULA
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MATHEMATICA
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okQ[n_]:=Module[{x=2n-3}, PrimeQ[x]&&IntegerQ[(x-3)/4]]; Select[Range[1, 315, 2], okQ] (* Harvey P. Dale, Jan 12 2011 *)
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CROSSREFS
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Cf. A050415 (primes of the form 2^k-3).
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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