OFFSET
1,1
COMMENTS
Column 5 of A208269
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 21*a(n-1) +9*a(n-2) -278*a(n-3) +73*a(n-4) +790*a(n-5) -662*a(n-6) +29*a(n-7) +69*a(n-8) -10*a(n-9)
EXAMPLE
Some solutions for n=4
..0..0..1..0..0....0..1..1..0..0....0..0..0..0..0....0..1..1..1..1
..1..1..1..1..0....0..1..0..0..1....1..1..0..1..0....1..0..0..0..0
..1..0..1..0..0....1..0..0..1..1....1..0..1..1..1....1..1..1..1..0
..1..1..1..0..1....0..1..1..0..0....1..1..1..0..1....0..1..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 24 2012
STATUS
approved