OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..50
FORMULA
Empirical: a(n)=a(n-1)+a(n-3)-a(n-4)+a(n-5)+a(n-6)-a(n-9) - R. H. Hardin, Jun 13 2011
Empirical g.f.: x*(2 + 2*x^4 + x^5 - x^7 - x^8) / ((1 - x - x^3)*(1 + x^4 - x^6)). - Colin Barker, May 04 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 10 2011
STATUS
approved