OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-2) + 5*a(n-3) + 4*a(n-4) - 4*a(n-5) - 8*a(n-6) - 5*a(n-7) - 3*a(n-8) + 2*a(n-9) + 3*a(n-10).
Empirical g.f.: x*(54 + 95*x + 174*x^2 + 27*x^3 - 363*x^4 - 477*x^5 - 286*x^6 - 81*x^7 + 152*x^8 + 156*x^9) / (1 - x^2 - 5*x^3 - 4*x^4 + 4*x^5 + 8*x^6 + 5*x^7 + 3*x^8 - 2*x^9 - 3*x^10). - Colin Barker, Dec 26 2018
EXAMPLE
Some solutions for n=4:
..0..1..0..0....0..1..0..0....1..0..0..0....1..0..0..0....1..1..0..0
..0..1..0..0....0..0..0..0....1..0..0..0....1..0..0..1....0..1..0..0
..0..0..0..0....0..0..0..0....0..0..0..1....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..1..0....0..0..0..1....0..0..0..0....0..0..0..0
..1..1..0..0....0..0..1..0....1..0..0..0....1..1..0..0....0..0..1..0
..0..0..0..0....0..0..0..0....1..0..0..0....0..0..0..0....0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 03 2015
STATUS
approved