OFFSET
1,1
COMMENTS
Column 5 of A184761.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 13*a(n-1) + 150*a(n-2) + 550*a(n-3) + 889*a(n-4) + 434*a(n-5) - 228*a(n-6) + 32*a(n-7).
Empirical g.f.: x*(16 + 109*x + 326*x^2 + 417*x^3 + 176*x^4 - 166*x^5 + 40*x^6) / (1 - 13*x - 150*x^2 - 550*x^3 - 889*x^4 - 434*x^5 + 228*x^6 - 32*x^7). - Colin Barker, Apr 14 2018
EXAMPLE
Some solutions for 3 X 5:
..1..1..0..0..0....0..0..0..0..0....1..0..1..0..1....0..0..1..1..1
..0..0..1..0..0....0..0..0..1..1....1..0..1..1..0....1..1..0..0..1
..0..0..1..0..0....0..0..0..1..0....1..1..0..1..0....1..0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 21 2011
STATUS
approved