A147444 - OEIS

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A147444

Number of n X n binary arrays with all ones connected only in a 11000-01100-00110-00011 pattern in any orientation.

1, 1, 1, 1, 9, 33, 169, 1097, 10553, 189871, 4385605, 121876221, 4534799043

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

OFFSET

1,5

LINKS

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

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.1.1.0

.0.0.0.0.1.1.0.1

.0.0.0.1.1.0.1.1

.0.0.1.1.0.1.1.0

.1.1.0.0.1.1.0.0

.0.1.1.0.1.0.0.0

.0.0.1.1.0.0.0.0

.0.0.0.1.1.0.0.0

CROSSREFS

Sequence in context: A097804 A146136 A264258 * A189179 A146445 A046997

Adjacent sequences: A147441 A147442 A147443 * A147445 A147446 A147447

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved