OFFSET
1,1
COMMENTS
Column 6 of A255228
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) -a(n-2) +a(n-3) -a(n-4)
EXAMPLE
Some solutions for n=4
..1..1..1..1..1..1..1..1....1..1..1..1..1..1..1..1....0..0..1..0..0..0..0..1
..0..0..1..0..0..1..0..0....1..0..0..0..1..0..0..1....0..0..1..0..0..0..0..1
..0..0..1..0..0..1..0..0....1..0..0..0..1..0..0..1....1..1..1..1..1..1..1..1
..0..0..1..0..0..1..0..0....1..1..1..1..1..1..1..1....0..0..1..0..0..0..0..1
..1..1..1..1..1..1..1..1....1..0..0..0..1..0..0..1....0..0..1..0..0..0..0..1
..0..0..1..0..0..1..0..0....1..0..0..0..1..0..0..1....1..1..1..1..1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 17 2015
STATUS
approved