OFFSET
1,1
COMMENTS
Column 4 of A185866
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n)=13*a(n-1)+86*a(n-2)-729*a(n-3)-588*a(n-4)+7148*a(n-5)-4926*a(n-6)-832*a(n-7)-7418*a(n-8)+5675*a(n-9)-4618*a(n-10)+5644*a(n-11)-1871*a(n-12)+4193*a(n-13)-1693*a(n-14)+70*a(n-15)-954*a(n-16)-206*a(n-17)+152*a(n-18)+28*a(n-19) for n>21
EXAMPLE
Some solutions for 4X6
..0..1..0..0..1..1....0..1..0..1..0..0....0..1..1..1..1..1....0..1..1..0..0..0
..0..1..0..0..1..1....0..0..0..1..1..1....0..0..0..0..1..0....0..1..1..0..1..1
..0..0..1..0..0..0....0..1..0..1..0..1....0..1..0..1..0..1....0..0..0..1..0..1
..1..0..1..0..1..0....0..0..0..0..1..0....1..0..0..0..1..1....0..0..0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 05 2011
STATUS
approved