OFFSET
1,1
COMMENTS
Column 4 of A184761.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 8*a(n-1) + 39*a(n-2) + 58*a(n-3) + 32*a(n-4).
Empirical g.f.: x*(8 + 25*x + 32*x^2 + 14*x^3) / (1 - 8*x - 39*x^2 - 58*x^3 - 32*x^4). - Colin Barker, Feb 27 2018
EXAMPLE
Some solutions for 3 X 4:
..1..1..0..0....0..1..1..1....1..0..1..0....0..1..1..0....0..1..0..1
..1..0..0..1....0..0..0..0....0..1..0..0....1..0..0..1....0..1..0..0
..1..1..1..0....0..0..0..1....0..0..0..1....1..1..0..0....0..1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 21 2011
STATUS
approved