OFFSET
1,1
COMMENTS
Column 4 of A183688.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 13*a(n-2) + 16*a(n-3).
Empirical g.f.: 16*x*(3 + 13*x + 13*x^2) / (1 - 13*x^2 - 16*x^3). - Colin Barker, Apr 04 2018
EXAMPLE
Some solutions for 3 X 5:
..0..1..1..1..1....1..1..1..0..1....1..1..0..1..0....1..0..1..1..0
..1..1..0..1..0....1..0..1..1..0....0..1..1..0..1....0..1..0..1..1
..0..1..1..0..1....0..1..0..1..1....1..1..0..1..0....1..1..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 06 2011
STATUS
approved