A185478 Number of (n+1)X(n+1) binary arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant

0, 148, 4740, 431655, 92026207, 51354095605, 70588969710949, 246617622494198862, 2154931835018459820138, 47474118606355438067066326

Offset

1,2

Comments

Diagonal of A185487

Links

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

Example

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

Crossrefs

Sequence in context: A224055 A224308 A224372 * A210159 A252770 A035822

Adjacent sequences: A185475 A185476 A185477 * A185479 A185480 A185481

Keyword

nonn

Author

R. H. Hardin Jan 28 2011

Status

approved