OFFSET
0,2
LINKS
R. H. Hardin, Table of n, a(n) for n = 0..500
Index entries for linear recurrences with constant coefficients, signature (2,0,0,-2,1).
FORMULA
a(n) = 2*a(n-1) - 2*a(n-4) + a(n-5). - Andrew Howroyd, Feb 14 2018
G.f.: 1/((1 - x)*(1 - x - x^2 - x^3 + x^4)). - R. J. Mathar, Dec 01 2011
MATHEMATICA
LinearRecurrence[{2, 0, 0, -2, 1}, {1, 2, 4, 8, 14}, 50] (* G. C. Greubel, Sep 18 2017 *)
PROG
(PARI) Vec(1/((1 - x)*(1 - x - x^2 - x^3 + x^4)) + O(x^40)) \\ G. C. Greubel, Sep 18 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 14 2009
EXTENSIONS
a(0)-a(3) prepended by Andrew Howroyd, Feb 14 2018
STATUS
approved