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A236761 Numbers n such that n^4-n+1 is prime. 3
3, 6, 9, 13, 16, 18, 19, 24, 33, 39, 43, 45, 46, 60, 63, 64, 69, 75, 78, 79, 85, 91, 94, 105, 106, 108, 109, 115, 121, 129, 138, 174, 175, 183, 195, 198, 205, 210, 220, 249, 250, 276, 289, 295, 300, 309, 313, 318, 324, 343, 346, 348 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
115^4 - 115 + 1 = 174900511 is prime. Thus, 115 is a member of this sequence.
MATHEMATICA
Select[Range[400], PrimeQ[#^4-#+1]&] (* Harvey P. Dale, Jun 03 2015 *)
PROG
(Python)
import sympy
from sympy import isprime
{print(n) for n in range(10**3) if isprime(n**4-n+1)}
(PARI)
s=[]; for(n=1, 400, if(isprime(n^4-n+1), s=concat(s, n))); s \\ Colin Barker, Jan 31 2014
CROSSREFS
Sequence in context: A317557 A338763 A159908 * A088364 A022853 A198264
KEYWORD
nonn
AUTHOR
Derek Orr, Jan 30 2014
STATUS
approved

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Last modified April 17 11:20 EDT 2024. Contains 371763 sequences. (Running on oeis4.)