A202454 Number of (n+2)X(n+2) binary arrays with consecutive windows of three bits considered as a binary number nondecreasing in every row and column

512, 1194, 3362, 10918, 38478, 141192, 528390, 1998486, 7609118, 29110180, 111787002, 430618204, 1663208690, 6438719028, 24976207182, 97056810102, 377757631038, 1472369063940, 5746130037258, 22451082059892, 87812623596642

Offset

1,1

Comments

Diagonal of A202461

Links

R. H. Hardin, Table of n, a(n) for n = 1..68

Example

Some solutions for 6X6
..0..0..0..1..0..0....0..0..0..0..1..1....0..0..0..0..0..0....0..0..0..0..0..1
..0..0..0..1..0..0....0..0..0..1..1..1....0..0..0..0..0..0....0..0..0..1..0..1
..0..0..0..1..1..1....0..0..1..1..1..1....0..0..0..0..0..1....0..0..0..1..0..1
..1..1..1..1..1..1....0..1..1..1..1..1....0..1..1..1..1..1....0..1..1..1..1..1
..0..1..1..1..1..1....1..1..1..1..1..1....0..0..0..1..0..1....1..1..1..1..1..1
..0..0..1..1..1..1....0..0..1..1..1..1....0..0..0..1..1..1....0..1..1..1..1..1

Crossrefs

Sequence in context: A045058 A220017 A234879 * A230543 A224651 A224644

Adjacent sequences: A202451 A202452 A202453 * A202455 A202456 A202457

Keyword

nonn

Author

R. H. Hardin Dec 19 2011

Status

approved