OFFSET
1,1
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..10000
EXAMPLE
for n=2, a(2) = 3 is in the sequence because 3^4 + 3^2 - 1 = 89 is prime.
MATHEMATICA
lst={}; Do[If[PrimeQ[n^4+n^2-1], AppendTo[lst, n]], {n, 400}]; lst
Select[Range[250], PrimeQ[#^4+#^2-1]&] (* Harvey P. Dale, Aug 24 2011 *)
PROG
(PARI) is(n)=isprime(n^4+n^2-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Michel Lagneau, Dec 01 2010
STATUS
approved