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 A010730 a(n) = (17 -3*(-1)^n)/2. 2
 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Period 2. LINKS Table of n, a(n) for n=0..65. Index entries for linear recurrences with constant coefficients, signature (0,1). FORMULA G.f.: ( -7-10*x ) / ( (x-1)*(1+x) ). - R. J. Mathar, Nov 21 2011 a(n) = 7 + 2^(1 - (-1)^n) - 1. - Vincenzo Librandi, Feb 28 2020 MATHEMATICA PadRight[{}, 120, {7, 10}] (* Harvey P. Dale, Jul 08 2019 *) PROG (Magma) &cat [[7, 10]^^50]; // Vincenzo Librandi, Feb 28 2020 CROSSREFS Sequence in context: A180732 A266551 A070405 * A225694 A247191 A317336 Adjacent sequences: A010727 A010728 A010729 * A010731 A010732 A010733 KEYWORD nonn AUTHOR N. J. A. Sloane. STATUS approved

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Last modified June 20 18:51 EDT 2024. Contains 373532 sequences. (Running on oeis4.)