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A212883
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Numbers n such that n^4 - prime(n) is prime.
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5
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2, 6, 40, 76, 144, 146, 148, 166, 168, 174, 186, 192, 210, 220, 222, 230, 238, 240, 258, 290, 338, 364, 372, 378, 384, 398, 400, 402, 442, 446, 482, 492, 532, 536, 554, 570, 606, 628, 654, 700, 740, 882, 888, 944, 954, 964, 966, 978, 1038, 1040, 1072, 1080
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OFFSET
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1,1
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COMMENTS
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See A064712 for the sequence of values of n such that n^2-prime(n) is prime. - John W. Layman, May 29 2012
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LINKS
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MAPLE
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A[1]:= 2: p:= 3: count:= 1:
for n from 4 to 10^4 by 2 do
p:= nextprime(nextprime(p));
if isprime(n^4-p) then
count:= count+1;
A[count]:= n;
fi
od:
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MATHEMATICA
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Reap[Do[If[PrimeQ[n^4-Prime[n]], Sow[n]], {n, 2, 1200, 2}]][[2, 1]]
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PROG
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(Magma) [n: n in [1..1200]|IsPrime(n^4-NthPrime(n))];
(PARI) for(n=1, 999, isprime(n^4-prime(n))&print1(n", ")) \\ M. F. Hasler, Jun 02 2012
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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