OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-1) -28*a(n-2) +74*a(n-3) -181*a(n-4) +236*a(n-5) -261*a(n-6) +234*a(n-7) +200*a(n-8) -279*a(n-9) +104*a(n-10) -268*a(n-11) -36*a(n-12) +156*a(n-13) +104*a(n-14) -32*a(n-15) -16*a(n-16).
EXAMPLE
Some solutions for n=5:
..3..1....0..0....0..3....0..0....3..3....3..3....3..3....3..1....3..1....0..0
..0..0....3..1....3..3....0..3....3..3....0..0....3..3....0..2....0..2....0..0
..2..2....2..2....3..2....0..2....3..2....2..0....2..2....0..2....0..2....0..0
..2..0....2..2....3..1....0..2....0..3....0..3....3..1....2..0....0..0....3..3
..3..2....3..1....2..0....0..0....2..0....0..2....3..1....0..0....0..2....0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 17 2014
STATUS
approved