OFFSET
1,1
COMMENTS
Column 1 of A202435.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +7*a(n-2) +6*a(n-3) -a(n-4) -2*a(n-5) +a(n-6).
Empirical g.f.: 6*x*(18 + 47*x + 33*x^2 - 7*x^3 - 11*x^4 + 6*x^5) / (1 - x - 7*x^2 - 6*x^3 + x^4 + 2*x^5 - x^6). - Colin Barker, May 28 2018
EXAMPLE
Some solutions for n=5:
..1..1..1....1..0..0....1..1..1....0..1..1....1..1..1....0..1..0....1..1..1
..1..1..1....0..1..1....1..1..0....1..1..1....1..1..1....1..1..1....1..0..1
..1..0..1....1..1..1....0..1..1....1..0..0....1..1..1....1..1..1....1..1..0
..1..1..1....1..1..1....1..1..1....1..1..1....1..1..1....1..1..0....0..1..1
..1..1..1....0..1..1....1..1..0....0..1..1....1..1..1....1..1..1....1..1..0
..1..0..0....1..1..1....1..0..1....1..1..0....1..0..1....0..1..1....0..1..1
..1..1..0....0..1..0....0..1..0....1..1..0....1..1..1....1..1..0....0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2011
STATUS
approved