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 A010679 Period 2: repeat (0,8). 1
 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Table of n, a(n) for n=0..80. Index entries for linear recurrences with constant coefficients, signature (0,1). FORMULA a(n) = 4*(1-(-1)^n) = 8*(n mod 2). - Paolo P. Lava, Oct 20 2006 G.f.: 8*x/((1-x)*(1+x)). - R. J. Mathar, Nov 21 2011 a(n) = 3^(1-(-1)^n) - 1. - Bruno Berselli, Dec 29 2015 MATHEMATICA PadRight[{}, 120, {0, 8}] (* Harvey P. Dale, Dec 21 2015 *) PROG (Magma) &cat [[0, 8]^^40]; // Bruno Berselli, Dec 29 2015 (PARI) a(n)=n%2*8 \\ Charles R Greathouse IV, Jul 26 2016 CROSSREFS Cf. A010700: 3^(1-(-1)^n) + 1. Sequence in context: A066606 A048729 A003131 * A347157 A186981 A347159 Adjacent sequences: A010676 A010677 A010678 * A010680 A010681 A010682 KEYWORD nonn,easy AUTHOR N. J. A. Sloane. STATUS approved

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Last modified May 30 13:17 EDT 2023. Contains 363050 sequences. (Running on oeis4.)