OFFSET
1,1
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 10*a(n-1)-37*a(n-2)+59*a(n-3)-27*a(n-4)-25*a(n-5)+21*a(n-6)+5*a(n-7)-4*a(n-8)-a(n-9) for n>9.
Empirical g.f.: x*(3 + 19*x - 57*x^2 + 34*x^3 + 43*x^4 - 7*x^5 - 13*x^6 - 2*x^7) / ((1 - x)^3*(1 - 2*x - x^2)^2*(1 - 3*x - x^2)). - Colin Barker, Jun 11 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Jun 10 2017
STATUS
approved