A147091 - OEIS

A147091

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

1, 1, 1, 5, 19, 87, 337, 1993, 25339, 376795, 8378039, 203827787, 6728351645, 320530236227

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

OFFSET

1,4

LINKS

EXAMPLE

Maximal 8 X 8 example

.0.1.1.1.1.0.0.0

.0.1.0.0.0.1.0.0

.0.1.0.0.0.1.0.1

.1.0.1.1.1.1.0.1

.1.0.0.0.0.0.0.1

.1.0.0.0.1.1.1.1

.1.1.1.1.0.0.0.0

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved