OFFSET
1,1
COMMENTS
Column 5 of A253524
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-1) -33*a(n-2) +65*a(n-3) -75*a(n-4) +51*a(n-5) -19*a(n-6) +3*a(n-7) for n>15
EXAMPLE
Some solutions for n=2
..2..2..0..1..1..1....1..1..0..0..1..2....1..2..0..2..2..0....2..2..0..0..2..2
..2..1..0..0..0..0....1..0..0..0..0..0....2..2..0..1..1..0....2..2..0..0..1..1
..0..0..0..2..2..2....1..0..2..2..2..1....0..0..0..0..1..2....2..1..0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2015
STATUS
approved