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