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 A199018 (3*11^n-1)/2. 1
 1, 16, 181, 1996, 21961, 241576, 2657341, 29230756, 321538321, 3536921536, 38906136901, 427967505916, 4707642565081, 51784068215896, 569624750374861, 6265872254123476, 68924594795358241, 758170542748940656, 8339875970238347221 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..900 Index entries for linear recurrences with constant coefficients, signature (12,-11). FORMULA a(n) = 11*a(n-1)+5. a(n) = 12*a(n-1)-11*a(n-2), n>1. G.f.: (1 + 4*x)/(1 - 12*x + 11*x^2). - Vincenzo Librandi, Jan 04 2013 MATHEMATICA (3*11^Range[0, 20]-1)/2 (* or *) LinearRecurrence[{12, -11}, {1, 16}, 20] (* Harvey P. Dale, Jul 16 2012 *) CoefficientList[Series[(1 + 4*x)/(1 - 12*x + 11*x^2), {x, 0, 30}], x] (* Vincenzo Librandi, Jan 04 2013 *) PROG (Magma) [(3*11^n-1)/2 : n in [0..20]] CROSSREFS Sequence in context: A218895 A016909 A001455 * A204608 A279282 A231135 Adjacent sequences: A199015 A199016 A199017 * A199019 A199020 A199021 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Nov 02 2011 STATUS approved

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Last modified June 5 03:52 EDT 2023. Contains 363130 sequences. (Running on oeis4.)