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A112983 2^(n+1) mod n. 6
0, 0, 1, 0, 4, 2, 4, 0, 7, 8, 4, 8, 4, 8, 1, 0, 4, 2, 4, 12, 16, 8, 4, 8, 14, 8, 25, 4, 4, 8, 4, 0, 16, 8, 1, 20, 4, 8, 16, 32, 4, 2, 4, 32, 34, 8, 4, 32, 11, 48, 16, 32, 4, 2, 31, 8, 16, 8, 4, 32, 4, 8, 16, 0, 64, 62, 4, 32, 16, 18, 4, 56, 4, 8, 61, 32, 36, 50, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

T. D. Noe, Table of n, a(n) for n = 1..10000

EXAMPLE

a(3) = 2^4 mod 3 = 16 mod 3 = 1.

MATHEMATICA

Table[PowerMod[2, n + 1, n], {n, 100}] (* T. D. Noe, Aug 13 2012 *)

PROG

(Python)

for n in range(1, 77):

    print 2**(n+1) % n, # Alex Ratushnyak, Aug 12 2012

CROSSREFS

Cf. A212844.

Sequence in context: A248252 A117238 A197291 * A068454 A090976 A156199

Adjacent sequences:  A112980 A112981 A112982 * A112984 A112985 A112986

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Oct 08 2005

EXTENSIONS

Name, data and offset corrected by Alex Ratushnyak, Aug 12 2012

STATUS

approved

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Last modified August 18 08:57 EDT 2019. Contains 326077 sequences. (Running on oeis4.)