OFFSET
1,1
COMMENTS
Column 1 of A263117.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) +72*a(n-3) -432*a(n-4) -1270*a(n-6) +7620*a(n-7) -2880*a(n-9) +17280*a(n-10) +113591*a(n-12) -681546*a(n-13) +115128*a(n-15) -690768*a(n-16)
EXAMPLE
Some solutions for n=4
..0..1..0....1..0..0....0..1..1....1..0..0....1..0..0....0..0..1....0..1..0
..0..0..1....0..0..1....1..0..0....1..0..0....1..0..1....1..1..0....1..0..1
..0..1..1....0..0..1....1..0..1....0..1..1....1..0..1....0..0..1....1..1..0
..1..1..0....1..0..1....1..0..1....0..1..0....0..1..0....0..1..0....0..1..1
..1..0..1....0..0..1....1..0..1....1..0..0....0..1..1....0..1..0....0..1..1
..0..1..1....0..1..1....0..1..0....1..1..0....1..0..1....0..1..1....0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 09 2015
STATUS
approved