OFFSET
1,1
COMMENTS
Column 2 of A219106.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) - 2*a(n-2) + 5*a(n-3) - 3*a(n-4) + a(n-5).
Empirical g.f.: x*(2 + 3*x + 2*x^2 - 2*x^3 + x^4) / (1 - 4*x + 2*x^2 - 5*x^3 + 3*x^4 - x^5). - Colin Barker, Mar 10 2018
EXAMPLE
Some solutions for n=3:
..1..1....0..1....0..1....1..0....1..0....0..1....1..1....1..1....0..1....0..0
..0..0....0..1....0..0....0..0....0..1....0..0....1..0....0..0....0..0....1..0
..0..1....0..1....0..1....1..1....0..1....1..0....0..1....1..1....1..1....1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 11 2012
STATUS
approved