OFFSET
1,1
COMMENTS
Column 4 of A251055
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 8*a(n-1) -25*a(n-2) +35*a(n-3) -7*a(n-4) -49*a(n-5) +77*a(n-6) -55*a(n-7) +20*a(n-8) -3*a(n-9) for n>12
EXAMPLE
Some solutions for n=4
..2..0..0..0..3....2..2..2..2..3....0..1..1..1..3....0..0..0..0..3
..2..0..0..0..3....0..0..0..0..0....0..0..0..0..2....1..0..0..0..2
..2..0..0..0..0....3..3..3..3..3....1..0..0..0..1....2..0..0..0..2
..2..0..0..0..0....0..0..0..0..0....1..0..0..0..1....2..0..0..0..2
..3..1..1..0..0....3..1..1..1..0....2..1..1..1..0....2..0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2014
STATUS
approved