OFFSET
1,1
COMMENTS
Column 1 of A204492.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) -a(n-2) +4*a(n-3) -10*a(n-4) +18*a(n-6) -23*a(n-7) -3*a(n-9) +43*a(n-10) -86*a(n-11) +114*a(n-12) -85*a(n-13) +46*a(n-14) -16*a(n-15) -3*a(n-16) -4*a(n-17) +4*a(n-18) for n>19.
EXAMPLE
Some solutions for n=3
..0..0..0....0..1..0....0..0..1....0..0..1....0..1..1....0..0..1....0..1..0
..0..1..1....0..0..1....0..1..0....1..1..0....0..1..0....0..1..0....1..1..1
..1..0..0....1..1..1....0..1..1....0..0..0....1..1..0....1..1..1....0..0..1
..0..1..0....0..1..0....1..1..0....0..1..1....0..1..1....0..0..1....1..0..0
..0..1..0....1..0..0....0..1..1....1..1..0....1..1..0....0..1..0....0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2012
STATUS
approved