OFFSET
1,1
COMMENTS
Column 2 of A185798.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = a(n-1) + 2*a(n-2) + 16*a(n-4) - 16*a(n-5).
Empirical g.f.: 8*x*(5 + 7*x + 6*x^2 + 20*x^3 - 32*x^4) / (1 - x - 2*x^2 - 16*x^4 + 16*x^5). - Colin Barker, Apr 16 2018
EXAMPLE
Some solutions for 5 X 3:
..0..1..0....1..1..1....1..0..0....0..0..1....0..0..0....0..0..1....0..1..1
..1..0..0....0..1..1....0..0..0....0..0..1....1..1..0....0..0..1....0..1..1
..0..0..0....0..0..1....0..0..1....0..1..1....1..0..1....1..1..1....0..0..0
..0..0..1....0..0..0....1..0..1....0..1..1....0..1..1....1..0..0....1..1..0
..0..1..1....1..0..0....0..1..1....0..0..0....0..0..0....0..0..0....1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 04 2011
STATUS
approved