A146373 - OEIS

A146373

Number of n X n binary arrays with all ones connected only in a 0100-1111-0100 pattern in any orientation.

1, 1, 1, 9, 25, 125, 1331, 18779, 389231, 11969301, 573650431, 41782304071, 4475707668912, 731606853804073, 181071469572900858

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

OFFSET

1,4

LINKS

EXAMPLE

Maximal 8 X 8 example

.0.1.0.0.0.0.0.0

.1.1.1.1.0.0.0.0

.0.1.0.0.0.0.1.0

.0.0.0.0.0.1.1.1

.0.1.0.0.1.0.1.0

.1.1.1.0.1.0.1.0

.0.1.0.1.1.1.0.0

.0.1.0.0.1.0.0.0

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved