OFFSET
1,1
COMMENTS
Column 1 of A252015
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) -2*a(n-2) +5*a(n-3) -8*a(n-4) +9*a(n-5) -8*a(n-6) +6*a(n-7) -9*a(n-8) +6*a(n-9) +a(n-10) -a(n-11) -3*a(n-13) +3*a(n-14) for n>22
EXAMPLE
Some solutions for n=4
..0..3..0....1..0..0....3..0..3....1..1..1....3..3..0....0..2..1....3..3..2
..1..2..3....1..1..1....0..1..2....0..1..0....3..2..1....3..1..2....3..3..0
..2..1..0....1..0..2....0..2..1....0..1..2....0..1..2....3..0..3....0..2..1
..0..3..3....1..2..3....3..0..3....1..1..1....3..3..0....2..0..1....3..1..2
..1..2..0....1..1..1....3..1..2....2..1..3....0..2..1....1..3..2....3..0..3
..2..3..3....1..3..2....0..0..3....3..1..2....3..1..2....0..3..0....0..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 12 2014
STATUS
approved