OFFSET
1,1
COMMENTS
Row 4 of A188706.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 8*a(n-1) - 12*a(n-2) + 4*a(n-3).
Empirical g.f.: x*(8 - 15*x + 8*x^2) / (1 - 8*x + 12*x^2 - 4*x^3). - Colin Barker, Apr 28 2018
EXAMPLE
Some solutions for 4 X 3:
1 0 0 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 0 1 1
0 1 1 0 0 0 1 1 0 1 1 1 1 1 0 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 0 0 1 1 1
1 1 0 1 1 0 0 1 1 1 0 0 1 1 1 1 1 1 0 0 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 08 2011
STATUS
approved