OFFSET
1,1
COMMENTS
Column 1 of A237574
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 23*a(n-2) +1473*a(n-4) +15833*a(n-6) +60176*a(n-8) +65344*a(n-10) -70656*a(n-12) -139264*a(n-14) for n>15
EXAMPLE
Some solutions for n=4
..2..3....1..1....2..1....1..1....3..2....2..2....2..2....3..2....3..3....0..2
..1..1....1..3....3..2....0..3....1..1....2..2....1..1....1..1....0..1....2..1
..3..3....1..2....1..1....3..2....3..0....1..1....1..3....1..0....1..0....3..2
..2..0....0..1....1..0....2..0....1..0....3..1....0..0....0..3....0..0....0..1
..2..2....3..0....2..3....1..0....3..3....3..2....3..0....3..3....1..3....0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 09 2014
STATUS
approved