A182350 - OEIS

A182350

Primes of the form n^4 - 5.

11, 251, 1291, 4091, 20731, 104971, 1048571, 2085131, 9834491, 11316491, 14776331, 18974731, 29986571, 49787131, 78074891, 168896011, 236421371, 406586891, 429981691, 454371851, 479785211, 959512571, 1146228731

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..23.

EXAMPLE

11 = 2^4 - 5; 251 = 4^4 - 5.

MAPLE

# choose N large, then S is the desired set

f:=n->n^4 - 5:

S:={}:

for n from 0 to N do if(isprime(f(n))) then S:=S union {f(n)}: fi: od:

MATHEMATICA

Select[Range[200]^4-5, PrimeQ] (* Harvey P. Dale, Apr 10 2017 *)

CROSSREFS

Cf. A037896.

Sequence in context: A238751 A098672 A056210 * A190680 A377327 A089298

Adjacent sequences: A182347 A182348 A182349 * A182351 A182352 A182353

KEYWORD

nonn

AUTHOR

Patrick Devlin, Apr 25 2012

STATUS

approved