OFFSET
1,1
COMMENTS
Column 4 of A186609
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..117
FORMULA
Empirical: a(n)=a(n-1)+a(n-3)-a(n-4)+a(n-5)-a(n-6)-a(n-8)+a(n-9)+a(n-10)-a(n-13) for n>18
EXAMPLE
Some solutions for 6X8
..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..0..0..0..1....0..0..0..0..0..0..1..1
..0..0..0..0..0..0..1..1....1..0..0..0..0..0..1..1....1..0..0..0..0..0..1..1
..1..1..0..0..0..0..0..0....1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0
..1..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..0..0..0....1..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 24 2011
STATUS
approved