OFFSET
1,2
COMMENTS
Diagonal of A252836
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..29
EXAMPLE
Some solutions for n=4
..0..0..1..2....0..0..1..1....0..0..1..1....0..0..1..1....0..0..0..1
..1..1..1..2....1..1..1..1....1..1..1..2....1..1..1..1....1..1..1..1
..1..1..2..2....1..1..1..1....1..1..1..2....1..2..2..2....1..1..1..1
..2..2..2..2....2..2..2..2....1..2..2..2....1..2..2..3....2..2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 22 2014
STATUS
approved