OFFSET
1,1
COMMENTS
Column 6 of A222838
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..112
FORMULA
Empirical: a(n) = 2*a(n-1) +2*a(n-2) -4*a(n-3) +4*a(n-4) -4*a(n-5) +2*a(n-6) -6*a(n-7) +a(n-10) for n>14
EXAMPLE
Some solutions for n=4
..0..1..2..2..3..0....0..1..1..2..0..3....0..1..2..2..1..3....0..1..2..0..3..1
..0..3..3..0..1..1....0..2..3..3..1..2....0..1..3..3..0..0....2..1..3..0..2..2
..2..2..1..0..2..3....1..2..0..0..1..2....3..2..0..1..2..2....2..0..3..1..1..3
..3..0..1..3..2..0....3..3..1..2..3..3....3..2..0..1..3..3....3..0..2..2..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 06 2013
STATUS
approved