A185741 Number of (n+1)X(n+1) binary arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace

0, 104, 4056, 458320, 145680504, 130602553784, 331658427568088, 2382038434840423712, 48425731027864802502768, 2786235185788797488510439424

Offset

1,2

Comments

Diagonal of A185750

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A298460 A299553 A187530 * A299333 A007267 A300174

Adjacent sequences: A185738 A185739 A185740 * A185742 A185743 A185744

Keyword

nonn

Author

R. H. Hardin Feb 01 2011

Status

approved