OFFSET
1,1
COMMENTS
Column 1 of A237332
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 288*a(n-4) -6720*a(n-8) +33536*a(n-12) for n>15
EXAMPLE
Some solutions for n=5
..2..1....1..2....0..1....1..2....2..2....1..2....2..1....2..0....0..0....1..1
..2..0....1..1....2..0....0..0....2..2....2..0....1..2....0..2....1..2....2..2
..2..0....0..2....2..0....2..0....1..2....0..2....1..1....1..2....1..2....2..1
..2..1....1..0....0..1....1..0....1..0....0..1....0..2....1..2....1..1....1..0
..0..1....1..2....2..1....1..2....2..2....0..1....1..0....2..0....1..1....1..1
..2..2....0..2....2..2....2..0....1..1....1..1....1..2....0..2....2..1....1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 06 2014
STATUS
approved