OFFSET
1,1
COMMENTS
Column 7 of A254204
EXAMPLE
Some solutions for n=4
..8....9....6....4....6....9....8....9....4....4....1....4....9....8....4....8
..7....7....2....2....4....9....6....9....8....2....8....8....7....4....6....4
..6....5....7....3....6....7....4....9....8....2....9....9....6....6....4....6
..9....9....9....1....6....9....8....9....8....8....9....1....8....4....4....6
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 26 2015
STATUS
approved