OFFSET
1,1
COMMENTS
Column 1 of A252679
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 22*a(n-3) -203*a(n-6) +1029*a(n-9) -3177*a(n-12) +6346*a(n-15) -8664*a(n-18) +8513*a(n-21) -5980*a(n-24) +2593*a(n-27) -305*a(n-30) -595*a(n-33) +664*a(n-36) -372*a(n-39) +162*a(n-42) -40*a(n-45) +8*a(n-48) for n>57
EXAMPLE
Some solutions for n=4
..3..1..3....0..2..0....3..1..3....2..0..3....1..1..0....1..1..0....2..0..0
..1..1..0....1..2..3....3..3..0....1..0..1....0..1..1....0..1..1....2..3..2
..0..1..1....2..0..0....2..0..0....1..1..0....3..2..0....0..2..3....0..0..2
..0..2..0....0..1..1....3..0..3....2..0..0....0..0..0....1..1..0....2..0..0
..1..1..0....2..0..3....3..3..0....1..3..1....1..1..3....0..1..1....1..3..2
..3..1..1....2..3..0....2..0..0....1..1..0....2..2..1....2..2..3....1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 20 2014
STATUS
approved