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A259257 Primes of the form n^4 - n^3 + n^2 - n + 1. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Price, Table of n, a(n) for n = 1..893

OEIS Wiki, Cyclotomic Polynomials at x=sigma(n)

FORMULA

a(n) = A246392(A060884(n)).

MATHEMATICA

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 *)

PROG

(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

CROSSREFS

Cf. A060884, A246392.

Sequence in context: A068846 A092164 A088545 * A289646 A020454 A009016

Adjacent sequences:  A259254 A259255 A259256 * A259258 A259259 A259260

KEYWORD

nonn,easy

AUTHOR

Robert Price, Jun 22 2015

STATUS

approved

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Last modified May 23 12:38 EDT 2019. Contains 323514 sequences. (Running on oeis4.)