OFFSET
1,1
COMMENTS
Row 4 of A208709
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-1) +31*a(n-2) -11*a(n-3) -71*a(n-4) -a(n-5) +38*a(n-6) -8*a(n-7) for n>9
EXAMPLE
Some solutions for n=4
..0..1..0..1....0..1..0..1....0..1..1..0....0..0..0..1....0..0..0..1
..1..0..1..1....1..1..0..1....0..0..1..0....1..0..1..1....1..0..0..0
..0..0..0..1....0..1..1..0....0..0..1..1....0..0..1..0....1..1..1..1
..0..1..0..1....0..0..1..1....1..0..0..0....0..1..0..0....1..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 01 2012
STATUS
approved