OFFSET
1,1
COMMENTS
Column 3 of A222386.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 8*a(n-1) + 8*a(n-2) - 64*a(n-3) - 16*a(n-4) + 128*a(n-5).
Empirical g.f.: 8*x*(1 - 2*x + 8*x^2 + 16*x^4) / ((1 - 2*x)^2*(1 + 2*x)^2*(1 - 8*x)). - Colin Barker, Aug 16 2018
EXAMPLE
Some solutions for n=3:
..1..1..1....1..1..1....0..1..0....1..1..1....0..0..1....0..1..1....0..1..1
..1..1..1....1..1..0....0..1..0....1..0..0....0..1..0....1..0..0....1..0..0
..1..1..0....0..1..1....1..0..0....0..1..1....1..1..1....1..0..1....1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 18 2013
STATUS
approved