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A147106 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1100-0111 pattern in any orientation. 0
1, 1, 1, 1, 3, 7, 15, 37, 181, 733, 3563, 18321, 120179, 876663, 8507491, 85942209, 1181855975 (list; graph; refs; listen; history; internal format)
OFFSET

1,5

EXAMPLE

Maximal 8 X 8 example

.1.0.0.0.1.1.1.0

.1.0.0.0.0.0.1.1

.1.1.0.0.0.0.0.1

.0.1.1.1.0.0.0.1

.1.0.0.0.1.1.1.0

.1.0.0.0.0.0.1.1

.1.1.0.0.0.0.0.1

.0.1.1.1.0.0.0.1

CROSSREFS

Sequence in context: A190571 A018020 A192472 * A078161 A146033 A147188

Adjacent sequences:  A147103 A147104 A147105 * A147107 A147108 A147109

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net), Nov 04 2008

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.