OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..500 (terms n = 1..210 from R. H. Hardin)
EXAMPLE
Some solutions for n=4
..3....3....1....2....2....0....3....0....0....1....2....2....1....0....0....3
..2....1....2....0....1....1....1....1....2....3....3....0....0....1....1....2
..3....2....1....2....0....3....0....0....1....2....2....1....1....3....2....0
..2....1....3....1....1....2....1....1....0....1....0....2....2....1....0....2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 09 2015
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Oct 25 2022
STATUS
approved