OFFSET
1,1
COMMENTS
Column 7 of A254539
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..8....1....9....6....4....1....4....4....6....4....9....4....8....1....4....9
..7....8....9....6....6....7....4....4....9....6....3....5....8....8....5....7
..6....7....9....2....6....1....1....6....1....2....3....1....8....3....6....4
..5....2....3....8....6....7....3....7....8....6....6....8....9....4....6....6
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 01 2015
STATUS
approved