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A027695 Number of primitive polynomials of degree n over GF(4). 9
1, 2, 4, 12, 32, 120, 288, 1512, 4096, 15552, 48000, 240064, 552960, 3439800, 9483264, 35640000, 134217728, 673699800, 1451188224, 9644765256, 23685120000, 115605729792, 401556013056, 1996264531840, 4566087106560, 26244000000000, 89961392102400, 356237685227520 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
MAPLE
with(numtheory): phi(4^n-1)/n;
PROG
(PARI) a(n) = if(n==0, 1, eulerphi(4^n-1)/n) \\ Andrew Howroyd, Feb 01 2024
CROSSREFS
Column k=4 of A369291.
Sequence in context: A148194 A289501 A274961 * A148195 A169807 A005028
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(24) onwards from Andrew Howroyd, Feb 01 2024
STATUS
approved

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Last modified March 29 07:27 EDT 2024. Contains 371265 sequences. (Running on oeis4.)