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A258356 Numbers n such that cyclotomic polynomial value Phi(10,n!) is prime. 0

%I #8 Jun 20 2015 14:43:13

%S 2,36,101,107,267,316

%N Numbers n such that cyclotomic polynomial value Phi(10,n!) is prime.

%C All values except 2 are probable primes.

%C a(7) > 7560.

%C That is, numbers n such that n! belongs to A246392. - _Michel Marcus_, May 30 2015

%e 2 is in the sequence because Phi(10,2!) = 1 - 2 + 2^2 - 2^3 + 2^4 = 11 is prime.

%t Select[Range[0, 7560], PrimeQ[Cyclotomic[10, #!]] &]

%Y Cf. A002981, A002982, A046029, A200906.

%K nonn,more

%O 1,1

%A _Robert Price_, May 27 2015

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)