OFFSET
1,1
COMMENTS
Column 4 of A184686.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 16*a(n-1) - 51*a(n-2) - 190*a(n-3) + 1058*a(n-4) - 848*a(n-5) - 1392*a(n-6) + 1536*a(n-7).
Empirical g.f.: 16*x*(13 - 59*x - 348*x^2 + 1974*x^3 - 1692*x^4 - 2688*x^5 + 3072*x^6) / (1 - 16*x + 51*x^2 + 190*x^3 - 1058*x^4 + 848*x^5 + 1392*x^6 - 1536*x^7). - Colin Barker, Apr 14 2018
EXAMPLE
Some solutions for 3 X 5:
..1..1..1..0..0....1..0..0..0..1....0..0..1..0..0....0..0..0..0..1
..0..0..0..0..0....1..0..0..0..0....0..0..0..0..0....1..1..0..0..0
..1..1..0..1..0....1..0..1..1..1....1..0..0..0..1....0..0..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 19 2011
STATUS
approved