A146413 - OEIS

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A146413

Number of n X n binary arrays with all ones connected only in a 1000-1111-1000 pattern in any orientation.

0

1, 1, 1, 9, 29, 137, 1117, 13601, 257342, 6436423, 229848194, 12134224575, 927491358387

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.0.1.1.1.0

.0.1.0.1.0.1.0.0

.0.1.0.1.0.1.0.0

.0.1.0.1.0.1.0.0

.0.0.1.1.1.0.1.0

.1.0.0.0.0.0.1.0

.1.1.1.1.0.0.1.0

.1.0.0.0.0.1.1.1

CROSSREFS

Sequence in context: A056258 A147282 A146602 * A146054 A321588 A173262

Adjacent sequences: A146410 A146411 A146412 * A146414 A146415 A146416

KEYWORD

nonn

AUTHOR

STATUS

approved