OFFSET
1,1
EXAMPLE
Some solutions for n=4:
..6....6....4....1....4....4....8....1....8....6....6....8....1....6....8....4
..4....4....5....5....8....2....4....7....2....8....2....2....3....4....2....5
..6....2....1....4....4....4....2....2....8....2....7....6....4....2....8....7
..8....8....8....6....8....8....8....6....4....8....1....4....8....6....6....8
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 26 2015
EXTENSIONS
a(23)-a(25) from Alois P. Heinz, Jan 27 2015
STATUS
approved