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A027745 Number of primitive polynomials of degree n over GF(9). 2
1, 4, 16, 96, 640, 5280, 27648, 340704, 1966080, 15676416, 124608000, 1341648000, 7166361600, 97763702400, 629315721216, 4680529920000, 42316647628800, 483414202656000, 2396062681399296, 35513562609100800 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..19.

MAPLE

with(numtheory): phi(9^n-1)/n;

CROSSREFS

Sequence in context: A131928 A229138 A098580 * A293143 A032184 A130683

Adjacent sequences:  A027742 A027743 A027744 * A027746 A027747 A027748

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 19 17:41 EDT 2018. Contains 313880 sequences. (Running on oeis4.)