A147209 - OEIS

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A147209

Number of n X n binary arrays with all ones connected only in a 1100-0111-0011 pattern in any orientation.

1, 1, 1, 17, 57, 405, 4805, 131407, 3796773, 159419173, 11442459321, 1404806567709

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

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Maximal 8 X 8 example

.0.0.1.1.0.1.1.0

.1.1.1.0.0.1.1.0

.1.1.0.0.0.0.1.1

.0.0.1.0.1.1.0.1

.0.1.1.0.1.1.0.0

.1.1.0.1.1.0.1.1

.1.1.0.1.0.1.1.1

.0.0.0.0.1.1.0.0

CROSSREFS

Sequence in context: A146437 A146783 A146570 * A147239 A264473 A146578

Adjacent sequences: A147206 A147207 A147208 * A147210 A147211 A147212

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved