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A319166 Number of primitive polynomials of degree n over GF(11). 4
4, 16, 144, 960, 12880, 62208, 1087632, 7027200, 85098816, 691398400, 10374307328, 49985372160, 1061265441600, 7064952935040, 90426613939200, 708867057254400, 11892871258806912, 65078340559220736, 1287559798913990448, 8819554320783360000, 111715065087913437696 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..50

Eric W. Weisstein, MathWorld: Totient Function

Wikipedia, Euler's totient function

FORMULA

a(n) = phi(11^n - 1)/n where phi is A000010.

PROG

(PARI) {a(n) = eulerphi(11^n-1)/n}

CROSSREFS

phi(k^n-1)/n: A011260 (k=2), A027385 (k=3), A027695 (k=4), A027741 (k=5), A295496 (k=6), A027743 (k=7), A027744 (k=8), A027745 (k=9), A295497 (k=10), this sequence (k=11).

Cf. A000010.

Sequence in context: A156482 A335832 A173346 * A335400 A304193 A208661

Adjacent sequences:  A319163 A319164 A319165 * A319167 A319168 A319169

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Sep 12 2018

STATUS

approved

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Last modified August 8 01:57 EDT 2020. Contains 336287 sequences. (Running on oeis4.)