A186569 Number of (n+2) X (n+2) 0..5 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.

10077696, 1441, 64794, 1831246, 5762806, 7092466, 10131226, 18983086, 52102546, 250276606, 1023882766, 3333167026, 13883727886, 48468351346, 146915043406

Offset

1,1

Comments

Diagonal of A186570.

Links

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

Example

Some solutions for 4 X 4
..0..0..5..5....0..0..0..0....4..0..0..3....4..0..0..3....4..4..3..4
..0..0..0..4....3..0..0..0....0..4..0..0....0..4..0..0....3..4..4..3
..0..0..0..0....0..3..0..0....0..0..4..0....0..0..4..0....4..3..4..4
..0..0..0..0....4..0..3..0....3..0..0..4....1..0..0..4....4..4..3..4

Crossrefs

Cf. A186570.

Sequence in context: A258443 A183670 A176766 * A186570 A250597 A016869

Adjacent sequences: A186566 A186567 A186568 * A186570 A186571 A186572

Keyword

nonn

Author

R. H. Hardin, Feb 23 2011

Status

approved