%I
%S 11,71,239,599,1259,2351,14519,38219,83231,104651,129959,279311,
%T 389999,530711,1047551,1678319,2824079,3416951,8500139,12956399,
%U 17846399,22662359,26868671,35147111,40953599,45205451,47451431,57282191,59961791
%N Primes of form n^4  n^2  1.
%e a(2) = 71 is in the sequence because 3^4 + 3^2  1 = 71 is prime.
%t a={}; Do[p=n^4n^21; If[PrimeQ[p], AppendTo[a, p]], {n, 10^2}]; Print[a];
%t Select[Table[n^4n^21,{n,100}],PrimeQ] (* _Harvey P. Dale_, Jun 15 2014 *)
%K nonn
%O 1,1
%A _Michel Lagneau_, Dec 01 2010
