A184539 Number of (n+2)X(n+2) binary arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order

45, 193, 631, 1837, 5313, 16345, 54543, 194245, 719905, 2725367, 10430675, 40158073, 155173369, 601154073, 2333701711, 9075257125, 35345417073, 137846719279, 538258108483, 2104099248441, 8233431070825, 32247604093423

Offset

1,1

Comments

Diagonal of A184548

Links

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

Example

Some solutions for 4X4
..0..0..1..1....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1
..0..0..1..1....0..0..0..1....0..0..0..0....0..0..0..1....0..1..1..1
..1..1..0..1....0..0..1..1....0..0..1..1....0..0..0..1....0..1..1..1
..1..1..0..1....0..0..1..1....1..1..0..0....0..0..0..1....0..1..1..1

Crossrefs

Sequence in context: A158630 A158634 A091197 * A146302 A203835 A087442

Adjacent sequences: A184536 A184537 A184538 * A184540 A184541 A184542

Keyword

nonn

Author

R. H. Hardin Jan 16 2011

Status

approved