A185836 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace

0, 1773, 424197, 560733777, 3293066139075, 91469611366917651

Offset

1,2

Comments

Diagonal of A185845

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for 3X3
..0..1..0....1..2..2....0..0..2....0..2..2....2..0..1....0..0..1....1..0..2
..2..1..0....0..0..0....0..1..1....0..1..0....0..0..1....0..1..2....2..1..2
..1..0..1....1..1..2....2..1..0....1..1..1....1..2..1....2..1..1....2..1..2

Crossrefs

Sequence in context: A155023 A176478 A187132 * A047826 A143995 A205938

Adjacent sequences: A185833 A185834 A185835 * A185837 A185838 A185839

Keyword

nonn

Author

R. H. Hardin Feb 05 2011

Status

approved