OFFSET
1,1
COMMENTS
Row 5 of A188553.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = (1/120)*n^5 - (1/24)*n^4 + (3/8)*n^3 + (1/24)*n^2 + (157/60)*n + 3.
Conjectures from Colin Barker, Apr 27 2018: (Start)
G.f.: x*(6 - 25*x + 44*x^2 - 39*x^3 + 18*x^4 - 3*x^5) / (1 - x)^6.
a(n) = 6*a(n-1) - 15*a(n-2) + 20*a(n-3) - 15*a(n-4) + 6*a(n-5) - a(n-6) for n>6.
(End)
EXAMPLE
Some solutions for 5 X 3:
..1..1..0....1..1..1....1..1..1....0..0..0....1..1..1....1..1..1....1..1..1
..0..0..0....1..1..1....0..0..0....0..0..0....1..1..0....1..1..1....1..1..1
..0..0..0....1..1..1....0..0..0....0..0..0....1..0..0....1..1..1....1..1..1
..0..0..0....1..1..0....0..0..0....0..0..0....0..0..0....1..1..0....1..1..1
..0..0..0....1..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 04 2011
STATUS
approved