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A094920
a(n) = (5^n-1)/4 mod n.
3
0, 0, 1, 0, 1, 0, 1, 0, 4, 6, 1, 0, 1, 6, 1, 0, 1, 0, 1, 16, 10, 6, 1, 0, 6, 6, 13, 16, 1, 6, 1, 0, 31, 6, 11, 0, 1, 6, 31, 16, 1, 0, 1, 24, 31, 6, 1, 0, 29, 6, 31, 0, 1, 0, 11, 48, 31, 6, 1, 36, 1, 6, 31, 0, 1, 12, 1, 20, 31, 16, 1, 0, 1, 6, 31, 4, 39, 6, 1, 16, 40, 6, 1, 0, 16, 6, 31, 64, 1, 36, 57, 64
OFFSET
1,9
MATHEMATICA
Table[Mod[(5^n-1)/4, n], {n, 100}] (* Harvey P. Dale, Sep 20 2016 *)
PROG
(PARI) A094920(n) = lift(Mod((5^n-1)/4, n)); \\ Antti Karttunen, May 19 2020
CROSSREFS
Cf. A003463.
Sequence in context: A013247 A013248 A013254 * A010668 A200601 A277755
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 18 2004
STATUS
approved