OFFSET
1,1
COMMENTS
Column 3 of A220751
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..59
FORMULA
Empirical: a(n) = 8*a(n-1) +3*a(n-2) -24*a(n-3) -3*a(n-4) +24*a(n-5) +a(n-6) -8*a(n-7) for n>14
EXAMPLE
Some solutions for n=3
..0..1..1....1..1..1....0..1..1....0..0..0....0..1..0....0..1..0....0..0..1
..0..0..0....1..1..0....1..0..1....1..1..0....0..0..0....0..1..0....0..0..0
..0..0..0....0..0..1....0..1..0....0..1..1....1..0..0....1..0..1....0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 18 2012
STATUS
approved