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A027741
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Number of primitive polynomials of degree n over GF(5).
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13
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1, 2, 4, 20, 48, 280, 720, 5580, 14976, 99360, 291200, 2219460, 5184000, 46950120, 139991040, 876960000, 2752708608, 22384531584, 55435726080, 499226178000, 1280348160000, 10957459615200, 34031246515200, 259121741860800, 630789120000000, 5255180000000000
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OFFSET
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0,2
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LINKS
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MAPLE
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with(numtheory): phi(5^n-1)/n;
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PROG
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(PARI) a(n) = if(n==0, 1, eulerphi(5^n-1)/n) \\ Andrew Howroyd, Feb 01 2024
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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