OFFSET
1,1
COMMENTS
Column 3 of A252615
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 52*a(n-3) -856*a(n-6) +5181*a(n-9) -18180*a(n-12) +51196*a(n-15) -102032*a(n-18) +138624*a(n-21) -161024*a(n-24) +136192*a(n-27) -49152*a(n-30) for n>38
EXAMPLE
Some solutions for n=4
..2..3..3..2..0....2..0..1..2..2....0..3..2..0..3....0..2..3..0..2
..3..2..0..3..2....0..0..3..2..3....2..3..3..2..0....0..3..2..3..0
..2..2..1..2..2....0..2..3..0..2....2..1..2..2..1....1..2..2..1..2
..2..3..3..2..3....2..2..1..2..2....3..3..2..0..3....3..2..3..0..2
..3..2..3..0..2....2..3..3..2..0....2..0..3..2..3....3..3..2..0..3
..2..2..1..0..2....0..2..3..3..0....2..1..2..2..1....1..2..2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2014
STATUS
approved