OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 8*a(n-1) - 27*a(n-2) + 64*a(n-3) - 110*a(n-4) + 121*a(n-5) - 91*a(n-6) + 46*a(n-7) - 14*a(n-8) + a(n-9) - a(n-10).
Empirical g.f.: x*(61 - 250*x + 633*x^2 - 1229*x^3 + 1415*x^4 - 1090*x^5 + 552*x^6 - 163*x^7 - 2*x^8 - 11*x^9) / (1 - 8*x + 27*x^2 - 64*x^3 + 110*x^4 - 121*x^5 + 91*x^6 - 46*x^7 + 14*x^8 - x^9+ x^10). - Colin Barker, Nov 28 2018
EXAMPLE
Some solutions for n=4:
..1..1..1..0....1..1..1..1....0..0..0..1....1..1..1..0....0..1..1..0
..0..0..1..0....0..0..0..1....0..0..0..1....0..0..1..1....0..0..1..1
..0..0..1..1....1..0..0..1....1..0..0..0....1..0..0..0....0..0..0..1
..0..0..0..1....1..0..0..0....1..0..0..0....1..0..0..0....1..0..0..1
..1..1..0..1....1..1..1..0....1..0..0..0....1..1..1..0....1..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 01 2014
STATUS
approved