OFFSET
1,1
COMMENTS
Column 2 of A183594.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 24*a(n-1) - 30*a(n-2) - 296*a(n-3) + 192*a(n-4).
Empirical g.f.: x*(56 - 101*x - 772*x^2 + 512*x^3) / (1 - 24*x + 30*x^2 + 296*x^3 - 192*x^4). - Colin Barker, Mar 29 2018
EXAMPLE
Some solutions with a(1,1)=0 for 5 X 3:
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..1..3..2....3..2..3....2..3..1....1..2..3....1..3..2....1..3..1....2..1..2
..0..1..3....2..1..1....3..0..3....1..3..1....0..1..2....1..0..1....3..2..3
..0..3..0....1..0..2....0..1..0....3..0..1....2..0..1....2..0..2....0..3..1
..1..0..2....0..3..0....2..1..3....3..2..2....3..0..3....3..3..2....2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 05 2011
STATUS
approved