A185530 Number of (n+2)X7 binary arrays with each 3X3 subblock nonsingular

52662, 886926, 14532816, 230731304, 3749400138, 60674682444, 978050637454, 15816011545490, 255607860729284, 4128520011920866, 66715825040239470, 1078017197746908576, 17417146777474242918, 281426703318981682738

Offset

1,1

Comments

Column 5 of A185534

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 4X7
..0..1..1..0..0..1..0....0..1..0..1..0..1..1....0..0..1..0..0..1..0
..0..0..1..1..0..1..1....0..1..1..0..1..0..1....0..1..0..0..1..1..1
..1..1..1..1..1..1..0....1..0..0..1..1..0..0....1..0..0..1..1..1..0
..0..1..1..0..0..1..0....0..1..0..0..1..1..0....0..1..1..0..1..0..1

Crossrefs

Sequence in context: A200658 A303266 A355309 * A057851 A058326 A309556

Adjacent sequences: A185527 A185528 A185529 * A185531 A185532 A185533

Keyword

nonn

Author

R. H. Hardin Jan 30 2011

Status

approved