OFFSET
1,1
COMMENTS
Row 3 of A207717.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) + 7*a(n-2) - a(n-3) - 4*a(n-4) + a(n-5).
Empirical g.f.: 6*x*(1 + 4*x - 4*x^3 + x^4) / ((1 + x)*(1 - 4*x + x^2)*(1 + x - x^2)). - Colin Barker, Mar 05 2018
EXAMPLE
Some solutions for n=4:
..0..1..0..0....1..1..1..1....1..1..1..0....1..1..0..1....1..1..0..1
..0..1..1..0....1..1..1..1....0..1..1..0....0..1..0..0....0..1..1..0
..0..1..1..0....1..1..1..0....1..0..1..0....1..1..0..1....1..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 19 2012
STATUS
approved