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 A091929 Expansion of (1-6x)/(1-6x-11x^2). 1
 1, 0, 11, 66, 517, 3828, 28655, 214038, 1599433, 11951016, 89299859, 667260330, 4985860429, 37255026204, 278374621943, 2080053019902, 15542438960785, 116135216983632, 867778130470427, 6484156169642514, 48450496453029781 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Let the generating matrix of the Golay G_24 code be [I|A]. Then a(n)=(A^n)_1,1. REFERENCES S. Roman, Introduction to Coding and Information Theory, Springer-Verlag, 1996, p. 224 LINKS Harvey P. Dale, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (6,11). FORMULA a(n) = (1/2 - 3*sqrt(5)/20)*(3 + 2*sqrt(5))^n + (3 - 2*sqrt(5))^n*(1/2 + 3*sqrt(5)/20). MATHEMATICA CoefficientList[Series[(1-6x)/(1-6x-11x^2), {x, 0, 30}], x] (* or *) LinearRecurrence[{6, 11}, {1, 0}, 30] (* Harvey P. Dale, Apr 25 2018 *) CROSSREFS Cf. A091927, A015553. Sequence in context: A210392 A316110 A030115 * A244304 A058883 A141969 Adjacent sequences:  A091926 A091927 A091928 * A091930 A091931 A091932 KEYWORD easy,nonn AUTHOR Paul Barry, Feb 16 2004 STATUS approved

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Last modified August 3 19:32 EDT 2020. Contains 336201 sequences. (Running on oeis4.)