A174822 - OEIS

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A174822

Primes of form n^4 - n^2 - 1.

11, 71, 239, 599, 1259, 2351, 14519, 38219, 83231, 104651, 129959, 279311, 389999, 530711, 1047551, 1678319, 2824079, 3416951, 8500139, 12956399, 17846399, 22662359, 26868671, 35147111, 40953599, 45205451, 47451431, 57282191, 59961791

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..29.

EXAMPLE

a(2) = 71 is in the sequence because 3^4 + 3^2 - 1 = 71 is prime.

MATHEMATICA

a={}; Do[p=n^4-n^2-1; If[PrimeQ[p], AppendTo[a, p]], {n, 10^2}]; Print[a];

Select[Table[n^4-n^2-1, {n, 100}], PrimeQ] (* Harvey P. Dale, Jun 15 2014 *)

CROSSREFS

Sequence in context: A174202 A139850 A233416 * A201790 A268985 A211386

Adjacent sequences: A174819 A174820 A174821 * A174823 A174824 A174825

KEYWORD

nonn

AUTHOR

Michel Lagneau, Dec 01 2010

STATUS

approved