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 (1,1,1,0,-1,-1,-1).
FORMULA
G.f.: -x^4*(-13-8*x-2*x^2+8*x^3+14*x^4+12*x^5+8*x^6)/(1-x-x^2-x^3+x^5+x^6+x^7). - R. J. Mathar, Jan 19 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
R. H. Hardin, Aug 14 2009
STATUS
approved