A186590 Number of (n+3)X(n+3) 0..3 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock

4294967296, 2703, 33006, 2526165, 11494293, 16898709, 17395749, 20385141, 27395301, 42268437, 70928997, 139324629, 471686661, 1278076821, 2789296725

Offset

1,1

Comments

Diagonal of A186599

Links

Table of n, a(n) for n=1..15.

Example

Some solutions for 5X5
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..3..3
..2..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..2
..3..2..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..3
..2..3..2..0..0....1..0..0..0..0....2..1..0..0..0....0..0..0..0..0
..0..2..3..2..0....2..3..0..0..0....1..3..0..0..0....0..0..0..0..0

Crossrefs

Sequence in context: A198161 A244064 A255344 * A186599 A186591 A281576

Adjacent sequences: A186587 A186588 A186589 * A186591 A186592 A186593

Keyword

nonn

Author

R. H. Hardin Feb 24 2011

Status

approved