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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, 148, 444, 5401, 39372, 703983, 14050512, 523902288, 17552393136, 1009883277293, 82740925046288, 10723440611064915

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OFFSET

1,2

COMMENTS

Diagonal of A186902

LINKS

Table of n, a(n) for n=1..12.

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: A391425 A127028 A392518 * A233727 A178264 A121280

Adjacent sequences: A186891 A186892 A186893 * A186895 A186896 A186897

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 28 2011

STATUS

approved

URL: https://oeis.org/A186894

⇱ A186894 - OEIS