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 (0,2,-2)
MAPLE
seq(coeff(series((1-x)/(2*x^3-2*x^2+1), x, n+1), x, n), n = 0..40); # G. C. Greubel, Aug 04 2019
MATHEMATICA
CoefficientList[Series[(1-x)/(1-2*x^2+2*x^3), {x, 0, 40}], x] (* G. C. Greubel, Aug 04 2019 *)
PROG
(PARI) Vec((1-x)/(1-2*x^2+2*x^3)+O(x^40)) \\ Charles R Greathouse IV, Sep 27 2012
(Magma) R<x>:=PowerSeriesRing(Integers(), 40); Coefficients(R!( (1-x)/(1-2*x^2+2*x^3) )); // G. C. Greubel, Aug 04 2019
(Sage) ((1-x)/(1-2*x^2+2*x^3)).series(x, 40).coefficients(x, sparse=False) # G. C. Greubel, Aug 04 2019
(GAP) a:=[1, -1, 2];; for n in [4..40] do a[n]:=2*a[n-2]-2*a[n-3]; od; a; # G. C. Greubel, Aug 04 2019
CROSSREFS
KEYWORD
sign,easy
AUTHOR
N. J. A. Sloane, Nov 17 2002
STATUS
approved