OFFSET
1,1
COMMENTS
Column 3 of A183322.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = a(n-1) + 9*a(n-2) - 3*a(n-3) - 21*a(n-4) + a(n-5) + 13*a(n-6) + a(n-7) - a(n-8).
Empirical g.f.: x*(5 + 8*x - 15*x^2 - 21*x^3 + 10*x^4 + 13*x^5 - x^7) / (1 - x - 9*x^2 + 3*x^3 + 21*x^4 - x^5 - 13*x^6 - x^7 + x^8). - Colin Barker, Mar 27 2018
EXAMPLE
Some solutions for 5 X 3:
..1..1..1....0..1..1....1..1..0....1..1..0....1..1..0....1..1..1....1..1..0
..1..1..1....1..1..1....1..1..0....1..1..0....1..1..1....1..1..1....1..1..1
..0..0..0....1..1..1....0..0..0....0..1..1....1..1..1....0..0..0....0..0..1
..0..1..1....0..1..1....0..0..0....0..1..1....1..1..0....1..1..0....0..0..1
..0..1..1....0..0..1....0..1..1....0..0..1....1..1..0....1..1..1....0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2011
STATUS
approved