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A236759 Numbers n such that n^4+n-1 is prime. 4

%I #10 Jul 15 2020 13:15:45

%S 2,3,6,9,10,12,13,16,17,20,23,26,28,31,33,40,43,44,54,58,72,77,92,93,

%T 98,105,110,117,119,120,122,125,132,143,157,164,182,201,204,205,229,

%U 231,266,275,279,286,288,290,292,293,304,309,318

%N Numbers n such that n^4+n-1 is prime.

%e 98^4 + 98 - 1 = 92236913 is prime. Thus, 98 is a member of this sequence.

%t Select[Range[400],PrimeQ[#^4+#-1]&] (* _Harvey P. Dale_, Jul 15 2020 *)

%o (Python)

%o import sympy

%o from sympy import isprime

%o {print(n) for n in range(10**3) if isprime(n**4+n-1)}

%o (PARI)

%o s=[]; for(n=1, 400, if(isprime(n^4+n-1), s=concat(s, n))); s \\ _Colin Barker_, Jan 31 2014

%Y Cf. A049408, A126424.

%K nonn

%O 1,1

%A _Derek Orr_, Jan 30 2014

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Last modified April 18 14:42 EDT 2024. Contains 371780 sequences. (Running on oeis4.)