OFFSET
1,1
COMMENTS
Column 1 of A184386.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 10*a(n-1)-27*a(n-2)+81*a(n-3)-630*a(n-4)+1701*a(n-5)-1620*a(n-6)+4860*a(n-7)-13122*a(n-8)+8748*a(n-9).
EXAMPLE
Some solutions with a(1,1)=0 for 4 X 3
..0..2..2....0..2..0....0..2..2....0..2..1....0..2..1....0..0..0....0..0..2
..1..1..2....2..1..1....0..1..1....0..1..2....1..0..0....2..2..2....1..2..2
..1..0..0....0..2..1....0..2..1....0..2..1....1..2..2....1..1..1....0..1..1
..2..2..0....0..2..0....2..2..0....2..0..1....2..0..1....0..0..0....2..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 12 2011
STATUS
approved