A119721 Numbers n such that 4*n^4 + 7 is prime.

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, 107, 117, 118, 124, 127, 128, 132, 134, 135, 136, 149, 152, 169, 172, 178, 183, 192, 195, 200, 207, 227, 229, 234, 237, 239, 240, 250, 257, 262, 269, 277, 278, 279, 292

Offset

1,3

Links

Table of n, a(n) for n=1..59.

Example

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

Mathematica

Select[Range[0, 500], PrimeQ[4*#^4 + 7] &] (* Stefan Steinerberger, Jul 22 2006 *)

Prog

(PARI) is(n)=isprime(4*n^4+7) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Cf. A118660.

Sequence in context: A096781 A232055 A192818 * A098969 A235401 A354268

Adjacent sequences: A119718 A119719 A119720 * A119722 A119723 A119724

Keyword

nonn,less,easy

Author

Parthasarathy Nambi, Jun 13 2006

Extensions

More terms from Stefan Steinerberger, Jul 22 2006

Status

approved