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A027741 Number of primitive polynomials of degree n over GF(5). 13

%I #8 Feb 01 2024 21:09:56

%S 1,2,4,20,48,280,720,5580,14976,99360,291200,2219460,5184000,46950120,

%T 139991040,876960000,2752708608,22384531584,55435726080,499226178000,

%U 1280348160000,10957459615200,34031246515200,259121741860800,630789120000000,5255180000000000

%N Number of primitive polynomials of degree n over GF(5).

%H Andrew Howroyd, <a href="/A027741/b027741.txt">Table of n, a(n) for n = 0..100</a>

%p with(numtheory): phi(5^n-1)/n;

%o (PARI) a(n) = if(n==0, 1, eulerphi(5^n-1)/n) \\ _Andrew Howroyd_, Feb 01 2024

%Y Column k=5 of A369291.

%K nonn

%O 0,2

%A _N. J. A. Sloane_

%E a(23) onwards from _Andrew Howroyd_, Feb 01 2024

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Last modified March 29 03:41 EDT 2024. Contains 371264 sequences. (Running on oeis4.)