OFFSET
1,1
COMMENTS
Column 4 of A183335.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n)=2*a(n-1)+2*a(n-2)+9*a(n-3)+14*a(n-4)+20*a(n-5)+9*a(n-6)-4*a(n-7)-24*a(n-8)-46*a(n-9)-43*a(n-10)-35*a(n-11)-16*a(n-12)+6*a(n-13)+11*a(n-14)+8*a(n-15)+7*a(n-16)+2*a(n-17)+a(n-18)+2*a(n-19).
EXAMPLE
Some solutions for 8 X 4
..0..1..1..0....0..0..0..1....0..1..0..1....1..0..1..0....0..0..0..1
..1..0..0..0....0..0..0..0....0..1..0..0....0..1..1..0....0..0..0..0
..1..0..0..0....0..0..1..1....0..1..1..0....1..1..0..0....1..1..0..0
..0..0..0..1....1..0..1..0....0..0..1..0....0..0..0..0....0..1..1..1
..0..0..0..1....1..0..1..1....0..0..1..0....0..0..1..1....0..0..0..0
..0..0..0..0....0..0..0..0....1..0..1..1....1..1..1..0....1..1..1..1
..1..1..0..0....1..1..1..1....1..0..0..0....0..0..0..0....0..0..0..0
..0..1..0..0....0..0..0..0....0..0..0..0....0..1..1..0....1..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 03 2011
STATUS
approved