OFFSET
1,1
COMMENTS
Column 4 of A180985
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n)=16*a(n-1)-120*a(n-2)+560*a(n-3)-1820*a(n-4)+4368*a(n-5)-8008*a(n-6)+11440*a(n-7)-12870*a(n-8)+11440*a(n-9)-8008*a(n-10)+4368*a(n-11)-1820*a(n-12)+560*a(n-13)-120*a(n-14)+16*a(n-15)-a(n-16) (=polynomial degree 15)
EXAMPLE
Some solutions for 3X4
..0..0..1..1....0..0..0..0....0..1..1..1....0..0..1..1....0..0..0..1
..1..1..0..0....0..0..1..1....1..0..0..1....0..1..0..1....0..0..0..1
..1..1..1..1....1..1..1..1....1..0..1..1....1..1..1..0....0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 09 2011
STATUS
approved