OFFSET
1,1
COMMENTS
Column 2 of A186599
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..159
FORMULA
Empirical: a(n)=2*a(n-1)-a(n-2)+3*a(n-4)-6*a(n-5)+3*a(n-6)+3*a(n-8)-3*a(n-9) for n>14
EXAMPLE
Some solutions for 7X5
..0..0..2..0..3....0..0..2..3..2....0..0..0..3..3....0..0..0..2..3
..0..0..0..0..0....0..0..0..0..1....0..0..0..0..0....0..0..0..1..1
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..1..1..0..0..0....2..0..0..0..0....3..0..0..0..0....0..0..0..0..0
..0..3..0..0..0....0..3..0..0..0....2..1..0..0..0....3..2..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 24 2011
STATUS
approved