OFFSET
0,6
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..1000
M. Janjic, Determinants and Recurrence Sequences, Journal of Integer Sequences, 2012, Article 12.3.5. [N. J. A. Sloane, Sep 16 2012]
Index entries for linear recurrences with constant coefficients, signature (0,-1,-1).
FORMULA
a(n) = (-1)^n*A077961(n).
MATHEMATICA
CoefficientList[ Series[1/(1 + x^2 + x^3), {x, 0, 70}], x] (* Robert G. Wilson v, Mar 22 2011 *)
LinearRecurrence[{0, -1, -1}, {1, 0, -1}, 70] (* Harvey P. Dale, Dec 04 2015 *)
PROG
(PARI) Vec(1/(1+x^2+x^3)+O(x^70)) \\ Charles R Greathouse IV, Sep 26 2012
(Magma) R<x>:=PowerSeriesRing(Integers(), 70); Coefficients(R!( 1/(1+x^2+x^3) )); // G. C. Greubel, Jun 23 2019
(Sage) (1/(1+x^2+x^3)).series(x, 70).coefficients(x, sparse=False) # G. C. Greubel, Jun 23 2019
(GAP) a:=[1, 0, -1];; for n in [4..70] do a[n]:=-a[n-2]-a[n-3]; od; a; # G. C. Greubel, Jun 23 2019
CROSSREFS
KEYWORD
sign,easy
AUTHOR
N. J. A. Sloane, Nov 17 2002
STATUS
approved