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A185530 Number of (n+2)X7 binary arrays with each 3X3 subblock nonsingular 1
52662, 886926, 14532816, 230731304, 3749400138, 60674682444, 978050637454, 15816011545490, 255607860729284, 4128520011920866, 66715825040239470, 1078017197746908576, 17417146777474242918, 281426703318981682738 (list; graph; refs; listen; history; text; internal format)
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: A201268 A200658 A303266 * A057851 A058326 A309556

Adjacent sequences:  A185527 A185528 A185529 * A185531 A185532 A185533

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 30 2011

STATUS

approved

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Last modified April 5 06:13 EDT 2020. Contains 333238 sequences. (Running on oeis4.)