OFFSET
1,1
COMMENTS
Column 3 of A224606
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) -6*a(n-2) +5*a(n-3) -4*a(n-4) +3*a(n-5) -a(n-6) for n>8.
Empirical g.f.: 297*x +371*x^2 -x^3*(-482+1357*x-1390*x^2+1026*x^3-876*x^4+366*x^5) / ( (x^3+x-1)*(x-1)^3 ). - R. J. Mathar, Aug 22 2016
EXAMPLE
Some solutions for n=3
..0..1..0..0..0....1..0..0..0..0....1..0..0..0..0....1..0..0..0..0
..0..1..0..0..0....1..0..0..0..0....1..0..0..0..0....1..0..0..0..0
..0..1..0..0..0....1..0..0..0..0....1..0..0..0..0....1..0..0..0..0
..0..1..0..0..0....0..0..0..0..0....0..0..0..0..1....0..0..0..0..0
..0..0..0..0..1....2..0..0..1..1....0..0..0..0..1....0..2..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 11 2013
STATUS
approved