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 (0,1,2,2,1).
FORMULA
G.f.: -x^4*(13+23*x+27*x^2+20*x^3+8*x^4) / ( -1+x^2+2*x^3+2*x^4+x^5 ). - R. J. Mathar, Nov 30 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 14 2009
STATUS
approved