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A027745
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Number of primitive polynomials of degree n over GF(9).
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5
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1, 4, 16, 96, 640, 5280, 27648, 340704, 1966080, 15676416, 124608000, 1341648000, 7166361600, 97763702400, 629315721216, 4680529920000, 42316647628800, 483414202656000, 2396062681399296, 35513562609100800, 211942058803200000, 2006922093666287616, 16837843397760000000
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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(9^n-1)/n;
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PROG
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(PARI) a(n) = if(n==0, 1, eulerphi(9^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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