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A259257
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Primes of the form n^4 - n^3 + n^2 - n + 1.
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3
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11, 61, 521, 9091, 13421, 19141, 61681, 152381, 185641, 224071, 1151041, 1824841, 2031671, 3341101, 4778021, 5200081, 8987221, 25058741, 31224301, 32928901, 40454321, 42521761, 150451621, 212601841, 250062751, 292268861, 310565641, 329708341, 339604921
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OFFSET
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1,1
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LINKS
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FORMULA
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MATHEMATICA
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Select[Table[Cyclotomic[10, n], {n, 0, 200}], PrimeQ]
Select[Table[n^4 - n^3 + n^2 - n + 1, {n, 200}], PrimeQ] (* Vincenzo Librandi, Jun 23 2015 *)
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PROG
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(Magma) [a: n in [0..200] | IsPrime(a) where a is n^4-n^3+n^2-n+1]; // Vincenzo Librandi, Jun 23 2015
(PARI) lista(nn) = for (n=1, nn, if (isprime(p=polcyclo(10, n)), print1(p, ", "))); \\ Michel Marcus, Jun 23 2015
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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