OFFSET
1,1
COMMENTS
Column 7 of A252157
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = -a(n-1) +2*a(n-2) +14*a(n-3) +14*a(n-4) -28*a(n-5) -56*a(n-6) -56*a(n-7) +112*a(n-8) +64*a(n-9) +64*a(n-10) -128*a(n-11) for n>16
EXAMPLE
Some solutions for n=4
..3..3..3..3..3..3..3..2..0....3..3..2..0..2..0..2..3..3
..2..0..2..0..2..0..2..0..2....3..2..0..2..0..2..0..2..3
..0..2..0..2..0..2..0..2..0....2..0..2..0..2..0..2..0..3
..2..0..2..0..2..0..2..0..2....3..2..0..2..0..2..0..2..3
..0..2..0..2..0..2..0..2..0....3..0..2..0..2..0..2..0..2
..2..3..3..3..2..0..2..3..3....3..2..0..2..0..2..0..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 14 2014
STATUS
approved