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A174819
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Primes of form n^4 + n^2 - 1.
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1
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19, 89, 271, 4159, 10099, 20879, 28729, 38611, 50849, 130681, 391249, 457651, 1049599, 1187009, 1501849, 1875529, 3113459, 3420649, 3750031, 4102649, 6767801, 7893289, 9837631, 10559249, 11319859, 14780179, 17854849, 21385999, 31646249
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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(2) = 89 is in the sequence because 3^4 + 3^2 - 1 = 89 is prime.
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MAPLE
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select(isprime, [seq(n^4+n^2-1, n=1..1000)]); # Robert Israel, Mar 24 2017
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MATHEMATICA
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a={}; Do[p=n^4+n^2-1; If[PrimeQ[p], AppendTo[a, p]], {n, 10^2}]; Print[a];
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PROG
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(PARI) for(n=1, 1e3, if(isprime(p=n^4+n^2-1), print1(p ", "))) \\ Altug Alkan, Mar 24 2017
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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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