OFFSET
1,1
COMMENTS
Column 5 of A224133.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) - 9*a(n-2) + 4*a(n-3) + 2*a(n-4) + 8*a(n-5).
Empirical g.f.: x*(6 + 13*x^2 + 10*x^3 + 8*x^4) / (1 - 6*x + 9*x^2 - 4*x^3 - 2*x^4 - 8*x^5). - Colin Barker, Aug 27 2018
EXAMPLE
Some solutions for n=3:
..0..0..0..0..1....1..1..1..1..1....0..0..0..0..1....0..0..0..0..0
..0..0..0..0..1....1..1..1..1..1....0..0..1..1..1....1..1..1..1..1
..0..0..0..0..0....0..0..0..0..1....0..0..0..0..0....0..0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 31 2013
STATUS
approved