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 A049672 a(n) = (F(4*n) - F(n))/2, where F=A000045 (the Fibonacci sequence). 1
 0, 1, 10, 71, 492, 3380, 23180, 158899, 1089144, 7465159, 51167050, 350704322, 2403763416, 16475639933, 112925716670, 774004377655, 5305104928368, 36361730123272, 249227005938340, 1708227311451263 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS G. C. Greubel, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (8,-7,-6,1). FORMULA G.f.: x*(-1-2*x+2*x^2) / ( (x^2+x-1)*(x^2-7*x+1) ). - R. J. Mathar, Oct 26 2015 MATHEMATICA LinearRecurrence[{8, -7, -6, 1}, {0, 1, 10, 71}, 50] (* or *) Table[(1/2) *(Fibonacci[4*n] - Fibonacci[n]), {n, 0, 30}] (* G. C. Greubel, Dec 02 2017 *) PROG (PARI) for(n=0, 30, print1((fibonacci(4*n) - fibonacci(n))/2, ", ")) \\ G. C. Greubel, Dec 02 2017 (MAGMA) [(Fibonacci(4*n) - Fibonacci(n))/2: n in [0..30]]; // G. C. Greubel, Dec 02 2017 CROSSREFS Sequence in context: A224292 A016098 A129275 * A221548 A037579 A166791 Adjacent sequences:  A049669 A049670 A049671 * A049673 A049674 A049675 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified May 18 19:58 EDT 2021. Contains 344002 sequences. (Running on oeis4.)