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 A136297 a(n)=3a(n-1)-3a(n-2)+3a(n-3). 2
 1, 3, 1, -3, -3, 3, 9, 9, 9, 27, 81, 189, 405, 891, 2025, 4617, 10449, 23571, 53217, 120285, 271917, 614547, 1388745, 3138345, 7092441, 16028523, 36223281, 81861597, 185000517, 418086603, 944843049, 2135270889, 4825543329, 10905346467, 24645222081, 55696256829, 125869143645 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Harvey P. Dale, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (3, -3, 3). FORMULA O.g.f.: (-1+5*x^2)/(-1+3*x-3*x^2+3*x^3). a(n)=A052103(n+1)-5*A052103(n-1). - R. J. Mathar, Apr 04 2008 MATHEMATICA LinearRecurrence[{3, -3, 3}, {1, 3, 1}, 40] (* Harvey P. Dale, Jun 22 2013 *) CROSSREFS Sequence in context: A194299 A029154 A211974 * A243339 A244965 A049996 Adjacent sequences:  A136294 A136295 A136296 * A136298 A136299 A136300 KEYWORD sign,easy AUTHOR Paul Curtz, Mar 21 2008 EXTENSIONS More terms from R. J. Mathar, Apr 04 2008 STATUS approved

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Last modified March 26 01:08 EDT 2019. Contains 321479 sequences. (Running on oeis4.)