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A174384
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n such that n = product of 3 consecutive even numbers and n+-1 are primes.
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2
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192, 2688, 21840, 26880, 63840, 175392, 238080, 314160, 592368, 4573632, 9260160, 9527280, 13823040, 22424640, 27542400, 34010928, 35286240, 85182240, 103821120, 113377968, 150566640, 189116928, 220346448, 242968128, 257256912
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OFFSET
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1,1
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COMMENTS
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4*6*8 = 192+-1 -> primes,..
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LINKS
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MATHEMATICA
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f[n_]:=n*(n+2)*(n+4); Select[Table[f[n], {n, 0, 7!, 2}], PrimeQ[ #-1]&&PrimeQ[ #+1]&]
Select[Table[n(n+2)(n+4), {n, 0, 700, 2}], AllTrue[#+{1, -1}, PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Aug 18 2015 *)
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CROSSREFS
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KEYWORD
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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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