OFFSET

1,1

COMMENTS

Every 0 is next to 0 3's, every 1 is next to 1 1's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 4's

Column 7 of A196912

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..121

EXAMPLE

Some solutions for n=4

..0..0..0..0..0..1..1....0..0..1..1..0..0..1....0..0..0..0..0..0..0

..0..1..1..0..0..0..0....0..0..0..0..2..2..1....0..0..0..1..1..2..2

..0..0..0..1..2..2..0....1..0..1..1..2..2..0....0..0..0..0..0..2..2

..1..1..0..1..2..2..0....1..0..0..0..1..1..0....0..1..1..0..1..1..0

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 07 2011

STATUS

approved