OFFSET
1,1
COMMENTS
Column 1 of A186019.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..199
FORMULA
Empirical: a(n) = 32*a(n-1) + 1101*a(n-2) + 9060*a(n-3) + 25452*a(n-4) + 19440*a(n-5).
Empirical g.f.: 2*x*(16 + 367*x + 2718*x^2 + 7272*x^3 + 5400*x^4) / (1 - 32*x - 1101*x^2 - 9060*x^3 - 25452*x^4 - 19440*x^5). - Colin Barker, Apr 17 2018
EXAMPLE
Some solutions for 4 X 3:
..0..0..0....0..0..0....0..0..0....0..0..0....2..0..0....0..0..0....2..0..0
..2..0..3....0..2..1....2..0..3....0..0..3....0..2..0....2..0..1....2..2..0
..1..2..3....0..1..1....3..3..2....0..0..1....1..2..3....0..0..1....1..2..0
..0..0..2....2..2..3....2..1..3....0..1..2....2..0..3....0..1..2....2..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 10 2011
STATUS
approved