OFFSET
0,2
COMMENTS
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,-3,0,-1).
FORMULA
G.f.: (1-2x+x^2-x^3)/(1+3x^2+x^4).
|a(n)| = A094967(n+1). - R. J. Mathar, Dec 10 2010
PROG
(PARI) Vec((1-2*x+x^2-x^3)/(1+3*x^2+x^4) + O(x^50)) \\ Michel Marcus, Dec 03 2014
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Paul Barry, May 20 2010
STATUS
approved