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A083528 a(n) = 5^n mod 2*n. 6
1, 1, 5, 1, 5, 1, 5, 1, 17, 5, 5, 1, 5, 25, 5, 1, 5, 1, 5, 25, 41, 25, 5, 1, 25, 25, 53, 9, 5, 25, 5, 1, 59, 25, 45, 1, 5, 25, 47, 65, 5, 1, 5, 9, 35, 25, 5, 1, 19, 25, 23, 1, 5, 1, 45, 81, 11, 25, 5, 25, 5, 25, 125, 1, 5, 49, 5, 81, 125, 65, 5, 1, 5, 25, 125, 17, 3, 25, 5, 65, 161, 25, 5, 1, 65 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
a(n) = 1 iff n is in A067946. - Robert Israel, Dec 26 2014
LINKS
EXAMPLE
a(3) = 5 because 5^3 = 125 and 125 == 5 mod (2 * 3).
a(4) = 1 because 5^4 = 625 and 625 == 1 mod (2 * 4).
MAPLE
seq(5 &^n mod (2*n), n = 1 .. 100); # Robert Israel, Dec 26 2014
MATHEMATICA
Table[PowerMod[5, w, 2w], {w, 1, 100}]
PROG
(PARI) vector(100, n, lift(Mod(5, 2*n)^n)) \\ Michel Marcus, Dec 29 2014
(Magma) [Modexp(5, n, 2*n): n in [1..80]]; // Vincenzo Librandi, Oct 19 2018
CROSSREFS
Sequence in context: A098190 A339353 A050349 * A056957 A224834 A095118
KEYWORD
easy,nonn
AUTHOR
Labos Elemer, Apr 30 2003
STATUS
approved

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Last modified July 14 22:52 EDT 2024. Contains 374323 sequences. (Running on oeis4.)