OFFSET
1,1
COMMENTS
Column 5 of A202447.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) -8*a(n-3) +6*a(n-4) +6*a(n-5) -8*a(n-6) +3*a(n-8) -a(n-9) for n>10.
Empirical g.f.: 2*x*(242 - 308*x - 393*x^2 + 914*x^3 - 35*x^4 - 842*x^5 + 425*x^6 + 190*x^7 - 207*x^8 + 46*x^9) / ((1 - x)^6*(1 + x)^3). - Colin Barker, May 31 2018
EXAMPLE
Some solutions for n=4:
..1..0..1..1..1..1..1....1..1..1..1..1..1..1....1..1..1..1..1..1..1
..0..1..1..1..1..1..1....0..0..0..0..0..0..0....1..0..1..0..1..0..0
..1..1..1..1..1..1..1....0..1..0..1..1..1..1....1..1..1..1..1..1..1
..0..1..1..1..1..1..1....0..0..0..0..0..0..0....1..1..1..1..1..1..1
..1..1..1..1..1..1..1....0..1..0..1..0..1..0....1..1..1..1..1..1..1
..1..1..1..1..1..1..1....0..0..0..0..0..0..0....1..1..1..1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2011
STATUS
approved