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 A166446 Periodic (1,1,1,1,0,0,-1,-1,-1,-1,0,0). 2
 1, 1, 1, 1, 0, 0, -1, -1, -1, -1, 0, 0, 1, 1, 1, 1, 0, 0, -1, -1, -1, -1, 0, 0, 1, 1, 1, 1, 0, 0, -1, -1, -1, -1, 0, 0, 1, 1, 1, 1, 0, 0, -1, -1, -1, -1, 0, 0, 1, 1, 1, 1, 0, 0, -1, -1, -1, -1, 0, 0, 1, 1, 1, 1, 0, 0, -1, -1, -1, -1, 0, 0, 1, 1, 1, 1, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS a(n+2) is the Hankel transform of A110199. - Paul Barry, Jun 23 2010 LINKS Index entries for linear recurrences with constant coefficients, signature (0,1,0,-1). FORMULA G.f.: (1+x)/(1-x^2+x^4). MATHEMATICA LinearRecurrence[{0, 1, 0, -1}, {1, 1, 1, 1}, 50] (* G. C. Greubel, May 14 2016 *) PROG (MAGMA) &cat [[1, 1, 1, 1, 0, 0, -1, -1, -1, -1, 0, 0]^^10]; // Vincenzo Librandi, May 15 2016 CROSSREFS Cf. A010892 (bisection) Sequence in context: A285504 A130093 A115944 * A103368 A055132 A285403 Adjacent sequences:  A166443 A166444 A166445 * A166447 A166448 A166449 KEYWORD easy,sign AUTHOR Paul Barry, Oct 13 2009 EXTENSIONS Incorrect comment removed - R. J. Mathar, Oct 02 2012 STATUS approved

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Last modified February 26 01:41 EST 2020. Contains 332270 sequences. (Running on oeis4.)