OFFSET
1,1
COMMENTS
Column 2 of A184217
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n)=21*a(n-1)+243*a(n-2)-1800*a(n-3)-8335*a(n-4)+43037*a(n-5)+82290*a(n-6)-395548*a(n-7)-259095*a(n-8)+1530499*a(n-9)+86017*a(n-10)-2608822*a(n-11)+581376*a(n-12)+2049624*a(n-13)-748352*a(n-14)-707040*a(n-15)+310464*a(n-16)+86400*a(n-17)-41472*a(n-18)
EXAMPLE
Some solutions for 5X3
..2..2..2....2..2..0....2..2..2....2..2..2....2..2..2....2..2..0....2..2..2
..2..2..3....2..2..3....2..2..2....2..2..3....2..2..3....2..2..3....2..2..1
..3..3..0....3..3..0....3..3..2....1..3..1....2..2..3....2..2..2....3..1..3
..1..3..2....3..3..2....1..3..1....2..2..3....1..3..3....0..3..1....2..3..3
..3..2..1....0..3..3....3..3..1....2..3..2....0..3..1....2..2..2....3..3..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 10 2011
STATUS
approved