OFFSET
1,1
COMMENTS
Column 3 of A207467.
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) +11*a(n-4) +15*a(n-5) +4*a(n-6) -23*a(n-7) -17*a(n-8) +4*a(n-9) -7*a(n-10) +a(n-11) +a(n-12).
EXAMPLE
Some solutions for n=4
..1..0..0....0..0..1....1..1..0....1..1..1....1..0..0....0..0..1....1..1..0
..0..0..1....0..0..1....1..0..1....1..1..0....1..0..1....0..0..1....0..0..1
..0..0..1....0..0..1....1..0..1....1..0..0....1..0..1....1..1..1....0..0..1
..0..1..0....1..1..1....0..1..0....1..0..1....1..0..1....1..1..0....1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 18 2012
STATUS
approved