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A070349 a(n) = 2^n mod 43. 4
1, 2, 4, 8, 16, 32, 21, 42, 41, 39, 35, 27, 11, 22, 1, 2, 4, 8, 16, 32, 21, 42, 41, 39, 35, 27, 11, 22, 1, 2, 4, 8, 16, 32, 21, 42, 41, 39, 35, 27, 11, 22, 1, 2, 4, 8, 16, 32, 21, 42, 41, 39, 35, 27, 11, 22, 1, 2, 4, 8, 16, 32, 21, 42, 41, 39, 35, 27, 11, 22, 1, 2, 4, 8, 16, 32, 21 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,0,0,-1,1).

FORMULA

From R. J. Mathar, Feb 06 2011: (Start)

a(n) = a(n-1) - a(n-7) + a(n-8).

G.f.: ( -1-x-2*x^2-4*x^3-8*x^4-16*x^5+11*x^6-22*x^7 ) / ( (x-1)*(1+x)*(x^6-x^5+x^4-x^3+x^2-x+1) ). (End)

a(n) = a(n-14). - G. C. Greubel, Mar 11 2016

MATHEMATICA

PowerMod[2, Range[0, 50], 43]  (* G. C. Greubel, Mar 11 2016 *)

PROG

(PARI) a(n)=lift(Mod(2, 43)^n) \\ Charles R Greathouse IV, Mar 22 2016

(GAP) a:=List([0..100], n->PowerMod(2, n, 43));; Print(a); # Muniru A Asiru, Jan 28 2019

CROSSREFS

Sequence in context: A220105 A070351 A070350 * A070348 A130670 A070340

Adjacent sequences:  A070346 A070347 A070348 * A070350 A070351 A070352

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, May 12 2002

STATUS

approved

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Last modified October 21 19:16 EDT 2021. Contains 348155 sequences. (Running on oeis4.)