OFFSET
1,1
COMMENTS
Column 2 of A254947
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..3....3....3....2....2....2....2....2....2....2....2....3....3....3....3....3
..2....3....3....1....2....1....3....3....2....1....1....2....1....3....3....1
..3....2....3....3....1....2....1....2....3....1....2....1....2....2....1....1
..2....3....1....2....3....2....3....2....1....3....3....3....2....1....3....3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 10 2015
STATUS
approved