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Numbers n such that 4*n^4 + 7 is prime.
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%I #7 Jun 13 2017 12:45:42

%S 0,1,2,3,4,9,16,20,22,24,27,31,33,36,37,47,58,59,60,61,68,80,90,94,95,

%T 107,117,118,124,127,128,132,134,135,136,149,152,169,172,178,183,192,

%U 195,200,207,227,229,234,237,239,240,250,257,262,269,277,278,279,292

%N Numbers n such that 4*n^4 + 7 is prime.

%e If n=95 then 4*n^4 + 7 = 325802507 (prime).

%t Select[Range[0, 500], PrimeQ[4*#^4 + 7] &] (* _Stefan Steinerberger_, Jul 22 2006 *)

%o (PARI) is(n)=isprime(4*n^4+7) \\ _Charles R Greathouse IV_, Jun 13 2017

%Y Cf. A118660.

%K nonn,less,easy

%O 1,3

%A _Parthasarathy Nambi_, Jun 13 2006

%E More terms from _Stefan Steinerberger_, Jul 22 2006