OFFSET
1,1
COMMENTS
Column 8 of A188105
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n)=2*a(n-1)-a(n-2)+a(n-4)-2*a(n-5)+a(n-6)+a(n-8)-a(n-9) for n>18
EXAMPLE
Some solutions for 5X11
..0..0..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0..0..1
..0..0..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0..1..1
..1..0..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0..0..0
..1..0..0..0..0..0..0..0..0..0..0....0..1..0..0..0..0..0..0..0..0..0
..0..1..0..0..0..0..0..0..0..0..0....0..1..0..0..0..0..0..0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 20 2011
STATUS
approved