OFFSET
1,1
COMMENTS
Column 7 of A222838
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..64
FORMULA
Empirical: a(n) = 2*a(n-1) +a(n-3) -2*a(n-4) +4*a(n-5) +a(n-6) -a(n-9) for n>14
EXAMPLE
Some solutions for n=4
..0..1..2..2..3..1..2....0..1..1..2..0..0..1....0..1..1..2..3..1..2
..2..3..0..0..3..1..0....3..3..0..2..3..3..1....0..3..3..2..0..0..2
..2..3..1..1..2..2..3....1..2..0..1..1..2..0....1..2..0..1..1..3..3
..1..0..2..3..0..0..3....1..2..3..3..0..2..3....3..2..0..3..2..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 06 2013
STATUS
approved