OFFSET
1,1
COMMENTS
Column 1 of A237494
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2568*a(n-4) -371328*a(n-8) +15212544*a(n-12) -125530112*a(n-16) +93167616*a(n-20) -143392768*a(n-24) for n>27
EXAMPLE
Some solutions for n=4
..0..3....1..0....1..3....3..2....2..2....3..0....2..2....1..0....1..2....0..3
..2..3....3..0....2..2....3..3....2..0....3..0....2..1....0..2....3..1....0..1
..3..1....3..3....3..0....2..2....2..3....2..0....1..2....0..0....2..0....3..1
..3..3....0..2....2..1....2..1....0..1....1..3....2..0....1..0....3..0....2..2
..2..3....1..2....1..3....0..1....2..2....0..1....1..1....2..1....1..2....0..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 08 2014
STATUS
approved