OFFSET
1,1
COMMENTS
Row 7 of A208501.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) + 8*a(n-2) - 10*a(n-3) - 8*a(n-4) + 8*a(n-5) for n>7.
Empirical g.f.: 28*x*(1 + 26*x - 32*x^2 - 170*x^3 + 170*x^4 + 160*x^5 - 136*x^6) / (1 - 2*x - 8*x^2 + 10*x^3 + 8*x^4 - 8*x^5). - Colin Barker, Jul 03 2018
EXAMPLE
Some solutions for n=4:
..1..1..1..0....0..1..0..1....0..1..1..0....0..1..1..0....1..0..1..1
..1..0..1..1....0..1..0..0....0..1..0..0....1..0..1..0....1..1..1..1
..0..1..0..1....1..0..1..0....1..0..1..1....1..1..0..1....0..1..0..0
..0..1..1..0....1..1..1..0....1..0..1..1....0..1..0..1....1..0..1..1
..1..0..1..1....0..1..0..0....0..1..0..0....1..0..1..0....1..0..1..1
..1..1..0..1....1..0..1..1....1..1..1..1....1..1..1..0....0..1..0..0
..0..1..0..0....1..1..1..1....1..0..1..1....0..1..0..1....1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 27 2012
STATUS
approved