OFFSET
1,1
COMMENTS
Column 6 of A254204
EXAMPLE
Some solutions for n=4
..8....4....8....4....8....6....6....6....1....8....4....4....8....1....8....4
..4....4....6....8....8....2....3....6....3....4....4....5....6....5....1....2
..6....2....2....4....4....6....7....8....4....6....8....3....7....2....3....6
..4....6....4....6....8....8....8....1....8....6....4....6....1....8....6....8
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 26 2015
STATUS
approved