login
A186894
Number of (n+1)X(n+1) binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants
0
0, 148, 444, 5401, 39372, 703983, 14050512, 523902288, 17552393136, 1009883277293, 82740925046288, 10723440611064915
OFFSET
1,2
COMMENTS
Diagonal of A186902
EXAMPLE
Some solutions for 3X3
..0..0..0....1..0..1....0..1..1....0..0..1....0..0..1....0..1..0....0..0..0
..1..0..0....1..0..0....0..0..0....0..0..1....1..0..0....1..1..0....1..0..0
..0..0..0....1..0..1....1..1..1....0..0..1....1..0..0....1..0..0....1..0..1
CROSSREFS
Sequence in context: A134212 A344409 A127028 * A233727 A178264 A121280
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 28 2011
STATUS
approved