OFFSET
1,1
COMMENTS
Column 3 of A201384
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-2) -3*a(n-4) -8*a(n-6) +14*a(n-8) -14*a(n-12) +8*a(n-14) +3*a(n-16) -4*a(n-18) +a(n-20)
EXAMPLE
Some solutions for n=10
..0..0..1....0..0..0....0..0..1....0..0..1....0..0..0....0..0..1....0..0..0
..0..1..0....0..0..0....0..1..0....0..1..0....0..0..1....0..0..1....0..0..1
..0..1..0....0..0..1....0..1..0....0..1..0....0..0..1....0..0..1....0..0..1
..0..1..0....0..1..1....0..1..1....0..1..0....0..1..0....0..0..1....0..0..1
..0..1..1....0..1..1....0..1..1....1..0..0....0..1..0....0..1..1....0..0..1
..1..0..0....0..1..1....1..0..0....1..0..0....0..1..0....1..0..0....0..1..1
..1..0..1....0..1..1....1..0..0....1..0..1....1..0..1....1..0..1....1..0..1
..1..1..0....1..0..0....1..0..1....1..1..0....1..1..0....1..0..1....1..1..0
..1..1..0....1..1..0....1..1..0....1..1..0....1..1..1....1..0..1....1..1..0
..1..1..0....1..1..1....1..1..0....1..1..1....1..1..1....1..1..0....1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 30 2011
STATUS
approved