OFFSET
1,1
COMMENTS
Column 3 of A251652
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) -2*a(n-2) +10*a(n-3) -60*a(n-4) +34*a(n-5) +95*a(n-6) -64*a(n-7) -32*a(n-8) +16*a(n-9) for n>13
EXAMPLE
Some solutions for n=4
..2..0..1..2..0....2..0..1..2..0....0..2..1..3..2....1..0..2..1..3
..0..1..2..3..1....2..3..1..2..3....0..2..1..0..2....1..3..2..1..0
..1..2..0..1..2....2..0..1..2..0....3..2..1..3..2....1..3..2..1..3
..2..3..1..2..0....2..0..1..2..3....3..2..1..3..2....1..0..2..1..0
..3..1..2..3..1....2..3..1..2..0....0..2..1..0..2....1..0..2..1..0
..1..2..0..1..2....2..3..1..2..3....0..2..1..0..2....1..3..2..1..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 06 2014
STATUS
approved