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 A157728 a(n) = Fibonacci(n) - 4. 12
 1, 4, 9, 17, 30, 51, 85, 140, 229, 373, 606, 983, 1593, 2580, 4177, 6761, 10942, 17707, 28653, 46364, 75021, 121389, 196414, 317807, 514225, 832036, 1346265, 2178305, 3524574, 5702883, 9227461, 14930348, 24157813, 39088165, 63245982, 102334151 (list; graph; refs; listen; history; text; internal format)
 OFFSET 5,2 COMMENTS Partial sums of A071679. - R. J. Mathar, Oct 12 2010 LINKS Vincenzo Librandi, Table of n, a(n) for n = 5..287 Index entries for linear recurrences with constant coefficients, signature (2,0,-1). FORMULA From R. J. Mathar, Oct 12 2010: (Start) a(n) = 2*a(n-1) - a(n-3). G.f.: x^5*(1+x)^2/((x-1)*(x^2+x-1)). (End) PROG (MAGMA) [ Fibonacci(n) - 4: n in [5..50] ]; // Vincenzo Librandi, Apr 24 2011 (Haskell) a157728 = subtract 4 . a000045  -- Reinhard Zumkeller, Oct 31 2013 (PARI) a(n)=fibonacci(n) - 4 \\ Charles R Greathouse IV, Jun 11 2015 CROSSREFS Cf. A000045, A001611, A000071, A157725, A001911, A157726, A006327, A157727, A157728, A157729, A167616. Sequence in context: A027374 A265048 A266334 * A266335 A301125 A009922 Adjacent sequences:  A157725 A157726 A157727 * A157729 A157730 A157731 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, Jun 26 2010 STATUS approved

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Last modified September 19 01:46 EDT 2020. Contains 337175 sequences. (Running on oeis4.)