OFFSET
1,2
LINKS
R. H. Hardin, Table of n, a(n) for n=1..100
FORMULA
From R. J. Mathar, Aug 11 2009: (Start)
Empirical: a(n)= 10*a(n-1) -33*a(n-2) +45*a(n-3) -21*a(n-4) -15*a(n-5) +29*a(n-6) -9*a(n-7) -6*a(n-8) +a(n-9).
G.f.: x*(-1-2*x+5*x^2+x^4+x^6)/((x-1)*(x^2+2*x-1)*(x^6-7*x^5+x^4+6*x^3-11*x^2+7*x-1)). (End)
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 20 2009
STATUS
approved