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 A022133 Fibonacci sequence beginning 4, 15. 1
 4, 15, 19, 34, 53, 87, 140, 227, 367, 594, 961, 1555, 2516, 4071, 6587, 10658, 17245, 27903, 45148, 73051, 118199, 191250, 309449, 500699, 810148, 1310847, 2120995, 3431842, 5552837, 8984679, 14537516 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Table of n, a(n) for n=0..30. Tanya Khovanova, Recursive Sequences Index entries for linear recurrences with constant coefficients, signature (1, 1). FORMULA From Alois P. Heinz, Jul 31 2008: (Start) G.f.: (4+11*x)/(1-x-x^2). a(n) = term (1,1) in the 1 X 2 matrix [4,11] . [1,1; 1,0]^n. (End) MAPLE a:= n-> (Matrix([[4, 11]]).Matrix([[1, 1], [1, 0]])^n)[1, 1]: seq(a(n), n=0..35); # Alois P. Heinz, Jul 31 2008 MATHEMATICA a={}; b=4; c=15; AppendTo[a, b]; AppendTo[a, c]; Do[b=b+c; AppendTo[a, b]; c=b+c; AppendTo[a, c], {n, 1, 40, 1}]; a (* Vladimir Joseph Stephan Orlovsky, Jul 23 2008 *) Transpose[NestList[{#[[2]], #[[2]]+#[[1]]}&, {4, 15}, 40]][[1]] (* Harvey P. Dale, Dec 12 2010 *) LinearRecurrence[{1, 1}, {4, 15}, 40] (* Jean-François Alcover, Feb 14 2016 *) CROSSREFS Sequence in context: A032826 A190709 A166732 * A212921 A359958 A225562 Adjacent sequences: A022130 A022131 A022132 * A022134 A022135 A022136 KEYWORD nonn AUTHOR N. J. A. Sloane STATUS approved

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Last modified June 14 21:35 EDT 2024. Contains 373401 sequences. (Running on oeis4.)