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A000855 Final two digits of 2^n. 8
1, 2, 4, 8, 16, 32, 64, 28, 56, 12, 24, 48, 96, 92, 84, 68, 36, 72, 44, 88, 76, 52, 4, 8, 16, 32, 64, 28, 56, 12, 24, 48, 96, 92, 84, 68, 36, 72, 44, 88, 76, 52, 4, 8, 16, 32, 64, 28, 56, 12, 24, 48, 96, 92, 84, 68, 36, 72, 44, 88, 76, 52, 4, 8, 16, 32, 64, 28 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
Has period 20 (starting with a(2)=4).
LINKS
FORMULA
G.f.: -(50*x^12 +25*x^11 +13*x^10 -44*x^9 +28*x^8 -36*x^7 +32*x^6 +16*x^5 +8*x^4 +4*x^3 +2*x^2 +x +1) / ((x -1)*(x^2 +1)*(x^8 -x^6 +x^4 -x^2 +1)). - Colin Barker, Dec 01 2014
MATHEMATICA
PowerMod[2, Range[0, 60], 100] (* Harvey P. Dale, Jan 05 2012 *)
PROG
(PARI) a(n)=lift(Mod(2, 100)^n) \\ Charles R Greathouse IV, Dec 28 2012
CROSSREFS
Sequence in context: A223700 A036140 A036138 * A036135 A036131 A115424
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved

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Last modified March 28 08:12 EDT 2024. Contains 371236 sequences. (Running on oeis4.)