OFFSET
1,1
COMMENTS
Column 2 of A209593
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..30
FORMULA
a(n) = 3 ^ (2*n-(n modulo 2)) * 15 ^ ((n*n-2*n+(n modulo 2))/4)
EXAMPLE
Some solutions for n=3
..1..1..1....2..0..1....0..1..1....2..0..2....2..0..0....0..2..1....0..2..0
..1..2..2....0..1..2....1..2..1....2..1..0....0..0..0....2..1..0....1..1..2
..0..2..0....1..2..0....0..1..2....1..2..0....0..0..1....1..0..2....0..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2012
STATUS
approved