OFFSET
1,1
COMMENTS
Every 0 is next to 0 0's, every 1 is next to 1 0's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 1's
Column 7 of A197250
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..155
EXAMPLE
Some solutions containing all values 0 to 4 for n=4
..1..2..0..1..1..2..0....0..2..1..0..1..1..2....2..1..2..2..1..2..0
..0..1..3..1..0..1..1....2..1..4..1..2..0..1....1..0..1..1..0..1..1
..1..4..1..4..1..1..3....1..0..1..1..3..1..2....1..1..3..2..1..4..1
..2..1..0..1..2..0..1....2..1..1..0..1..2..0....0..2..1..0..1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 12 2011
STATUS
approved