OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) + 10*a(n-2) - 14*a(n-3) + 27*a(n-4) + 26*a(n-5) - 85*a(n-6) - 10*a(n-7) + 16*a(n-8).
Empirical g.f.: x*(13 - 2*x - 8*x^2 + 43*x^3 - 43*x^4 - 95*x^5 + 6*x^6 + 16*x^7) / (1 - 6*x - 10*x^2 + 14*x^3 - 27*x^4 - 26*x^5 + 85*x^6 + 10*x^7 - 16*x^8). - Colin Barker, Feb 21 2019
EXAMPLE
Some solutions for n=4:
..0..0..0..1. .1..1..0..1. .1..0..0..0. .1..0..0..0. .0..0..1..0
..1..0..1..0. .0..0..0..1. .0..1..0..0. .1..0..1..0. .1..0..1..0
..0..0..0..0. .0..0..0..1. .0..0..0..1. .0..0..0..1. .1..0..0..0
..0..0..0..0. .1..1..0..0. .0..0..0..0. .1..1..0..1. .1..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 10 2017
STATUS
approved