OFFSET
4,1
LINKS
R. H. Hardin, Table of n, a(n) for n=4..500
Index entries for linear recurrences with constant coefficients, signature (2,-1,0,1).
FORMULA
G.f.: -x^4*(13-6*x+4*x^2+8*x^3) / ( (x^2-x+1)*(x^2+x-1) ). - R. J. Mathar, Jan 19 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
R. H. Hardin, Aug 14 2009
STATUS
approved