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 A010729 a(n) = 8 - (-1)^n. 6
 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Table of n, a(n) for n=0..80. Index entries for linear recurrences with constant coefficients, signature (0,1). FORMULA Period 2. a(n+1) = A173512(n+1) - A173512(n). - Reinhard Zumkeller, Feb 20 2010 G.f.: ( -7-9*x ) / ( (x-1)*(1+x) ). - R. J. Mathar, Nov 20 2011 E.g.f.: 7*cosh(x) + 9*sinh(x). - Stefano Spezia, Sep 27 2023 MATHEMATICA PadRight[{}, 100, {7, 9}] (* Harvey P. Dale, May 09 2012 *) PROG (PARI) a(n)=8-(-1)^n \\ Charles R Greathouse IV, Jun 11 2015 CROSSREFS Sequence in context: A199742 A258112 A076668 * A340220 A182688 A342571 Adjacent sequences: A010726 A010727 A010728 * A010730 A010731 A010732 KEYWORD nonn,easy AUTHOR N. J. A. Sloane STATUS approved

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Last modified July 18 13:04 EDT 2024. Contains 374378 sequences. (Running on oeis4.)