OFFSET
1,2
COMMENTS
Column 1 of A185640
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n)=10*a(n-1)-11*a(n-2)-181*a(n-3)+913*a(n-4)-2534*a(n-5)+5804*a(n-6)-6040*a(n-7)-63917*a(n-8)+416786*a(n-9)-1628376*a(n-10)+4152240*a(n-11)-5982480*a(n-12)-534528*a(n-13)+38863872*a(n-14)-100047744*a(n-15)+170726400*a(n-16)-135198720*a(n-17)+75644928*a(n-18)
EXAMPLE
Some solutions for 3X2
..1..2....3..0....3..2....0..2....1..2....3..1....3..3....2..1....2..0....2..2
..2..3....2..1....2..1....1..1....0..0....2..1....3..3....0..0....2..1....0..0
..2..3....2..3....2..1....2..0....2..1....1..1....0..0....2..3....1..1....1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 01 2011
STATUS
approved