OFFSET
1,1
COMMENTS
Column 1 of A183698.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 5*a(n-1) + 8*a(n-2).
Conjectures from Colin Barker, Apr 04 2018: (Start)
G.f.: 2*x*(25 + 32*x) / (1 - 5*x - 8*x^2).
a(n) = (2^(1-n)*((5-sqrt(57))^n*(-15+2*sqrt(57)) + (5+sqrt(57))^n*(15+2*sqrt(57)))) / sqrt(57).
(End)
EXAMPLE
Some solutions for 3 X 2:
..2..0....0..2....2..2....0..1....0..2....1..0....1..2....1..2....1..2....0..2
..2..1....1..2....0..1....2..0....2..2....1..2....0..1....2..1....2..2....1..0
..2..2....0..2....1..1....1..1....1..2....1..1....2..1....0..1....1..0....1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 06 2011
STATUS
approved