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 A153465 9*4^n - 2. 2
 34, 142, 574, 2302, 9214, 36862, 147454, 589822, 2359294, 9437182, 37748734, 150994942, 603979774, 2415919102, 9663676414, 38654705662, 154618822654, 618475290622, 2473901162494, 9895604649982, 39582418599934 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 Index to sequences with linear recurrences with constant coefficients, signature (5,-4). FORMULA a(n)=A002063(n)-2. [From R. J. Mathar, Jan 03 2009] MATHEMATICA LinearRecurrence[{5, -4}, {34, 142}, 50] (* Vincenzo Librandi, Feb 22 2012 *) PROG (PARI) a(n)=9*4^n-2 \\ Charles R Greathouse IV, Jan 11 2012 (MAGMA) I:=[34, 142]; [n le 2 select I[n] else 5*Self(n-1)-4*Self(n-2): n in [1..50]]; // Vincenzo Librandi, Feb 22 2012 CROSSREFS Sequence in context: A172001 A158062 A141127 * A105714 A072319 A031398 Adjacent sequences:  A153462 A153463 A153464 * A153466 A153467 A153468 KEYWORD nonn,easy,changed AUTHOR Vincenzo Librandi, Dec 27 2008 STATUS approved

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