OFFSET
1,1
COMMENTS
Column 2 of A260980
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-2) +2*a(n-3) +a(n-4) +2*a(n-5) +6*a(n-6) +5*a(n-7) -3*a(n-8) -9*a(n-9) -8*a(n-10) -5*a(n-11) for n>14
EXAMPLE
Some solutions for n=4
..0..1..0..0....0..0..1..0....1..0..0..0....0..0..0..1....0..0..0..0
..0..0..0..1....0..1..0..0....0..0..1..0....0..1..0..0....0..0..1..0
..1..0..0..0....0..0..0..1....1..0..0..1....1..0..0..0....1..0..0..1
..0..0..1..0....1..0..0..0....0..1..0..0....0..0..1..0....0..1..0..0
..1..0..0..1....0..0..1..0....0..0..0..0....0..0..0..1....0..0..0..0
..0..1..0..0....0..0..0..1....1..0..0..0....0..1..0..0....1..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 06 2015
STATUS
approved