A146224 - OEIS

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A146224

Number of n X n binary arrays with all ones connected only in a 1100-1111 pattern in any orientation.

1, 1, 1, 29, 221, 2091, 47147, 1321607, 74618535, 6202582309, 806462292673

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

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Maximal 8 X 8 example

.1.0.1.1.1.1.0.1

.1.0.1.1.0.0.0.1

.1.1.0.0.0.0.1.1

.0.0.1.1.1.1.0.0

.0.0.1.1.0.0.0.0

.1.1.0.0.1.1.1.1

.1.1.1.1.0.0.1.1

CROSSREFS

Sequence in context: A042638 A213066 A324624 * A287306 A142066 A091631

Adjacent sequences: A146221 A146222 A146223 * A146225 A146226 A146227

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved