OFFSET
1,1
COMMENTS
Column 4 of A254204
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..25
EXAMPLE
Some solutions for n=4
..6....4....6....6....4....6....4....4....6....4....4....4....6....6....4....6
..6....6....6....6....4....6....2....4....4....2....2....2....4....4....6....6
..2....2....6....4....2....3....6....4....4....3....2....2....4....6....4....2
..6....4....6....4....4....1....4....6....4....1....4....6....6....4....4....4
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 26 2015
STATUS
approved