OFFSET
1,1
COMMENTS
Column 1 of A186200
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n)=6*a(n-1)+71*a(n-2)+539*a(n-3)+2454*a(n-4)+7868*a(n-5)+8056*a(n-6)-32420*a(n-7)-165096*a(n-8)-411360*a(n-9)-936288*a(n-10)-1586880*a(n-11)-1264896*a(n-12)-331776*a(n-13)
EXAMPLE
Some solutions for 3X2
..2..2....3..0....0..3....3..2....1..1....0..3....2..2....3..2....1..2....3..2
..3..3....0..0....1..2....0..1....0..0....0..2....0..0....3..1....2..1....2..2
..0..2....1..3....0..2....0..0....0..3....1..0....1..0....1..2....2..2....3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2011
STATUS
approved