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A089193
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Odd numbers n such that 2*n-7 is a prime of the form 4*k+3.
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4
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5, 7, 9, 13, 15, 19, 25, 27, 33, 37, 39, 43, 45, 55, 57, 67, 69, 73, 79, 85, 87, 93, 99, 103, 109, 115, 117, 123, 129, 135, 139, 145, 157, 159, 169, 177, 183, 187, 193, 195, 213, 219, 223, 225, 235, 237, 243, 247, 249, 253, 255, 265, 277, 285, 289, 297, 303
(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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tn7Q[n_]:=Module[{c=2n-7}, PrimeQ[c]&&Divisible[c-3, 4]]; Select[Range[ 5, 301, 2], tn7Q] (* Harvey P. Dale, May 18 2021 *)
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CROSSREFS
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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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