OFFSET
1,1
COMMENTS
Column 4 of A250277
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..23
EXAMPLE
Some solutions for n=6
..0....4....1....0....4....0....3....0....0....2....2....3....3....4....0....4
..1....2....0....3....3....1....0....1....0....0....4....4....1....3....4....2
..2....4....4....1....2....0....2....3....3....3....3....0....2....0....1....4
..4....1....1....0....3....2....3....0....4....3....2....2....3....1....2....1
..0....3....3....4....3....2....1....3....2....0....4....4....0....1....3....3
..4....0....3....2....2....3....3....4....4....2....3....1....3....4....4....1
..2....2....1....2....4....2....1....2....0....2....0....1....1....4....2....0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 16 2014
STATUS
approved