OFFSET
1,2
LINKS
R. H. Hardin, Table of n, a(n) for n=1..99
FORMULA
Empirical (for n>=5): a(n) = 6*a(n-1) + 18*a(n-2) - 32*a(n-3). - Vaclav Kotesovec, Nov 27 2012
Empirical g.f.: x*(1 + 15*x + 12*x^2 - 46*x^3) / (1 - 6*x - 18*x^2 + 32*x^3). - Colin Barker, Mar 26 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 01 2010
STATUS
approved