OFFSET
1,1
COMMENTS
Column 6 of A255107
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) -3*a(n-2) +a(n-3) +25*a(n-6) -42*a(n-7) +18*a(n-8) -10*a(n-12) +6*a(n-13)
EXAMPLE
Some solutions for n=4
..0....1....0....1....1....0....2....0....1....2....1....1....0....1....0....0
..2....0....0....2....1....0....0....1....0....0....1....1....0....1....1....1
..0....0....2....0....2....0....1....1....0....0....2....0....0....1....2....1
..0....1....2....0....0....1....1....0....0....0....1....0....1....2....0....0
..1....1....2....0....0....1....2....0....0....0....1....1....1....1....0....0
..2....1....0....1....1....0....2....0....0....0....1....2....1....1....0....1
..2....1....0....2....1....0....2....0....1....0....1....2....2....1....0....1
..2....1....1....2....1....0....2....1....2....1....1....2....2....1....1....2
..2....1....1....0....1....1....0....1....2....0....1....0....1....2....2....2
..0....2....2....0....2....2....0....2....0....0....0....1....2....2....1....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 14 2015
STATUS
approved