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Search: id:A146828
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A146828 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1000-1111-0100-0100 pattern in any orientation. +0
1
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 11, 11, 27, 27, 69, 69, 315, 315 (list; graph; listen)
OFFSET

1,13

EXAMPLE

Maximal 13 X 13 example

.0.0.0.0.1.1.0.1.1.0.0.0.0

.0.0.1.1.1.0.0.0.1.1.1.0.0

.0.1.0.0.1.0.0.0.1.0.0.1.0

.0.1.0.0.1.0.0.0.1.0.0.1.0

.1.1.1.1.0.0.0.0.0.1.1.1.1

.1.0.0.0.0.0.0.0.0.0.0.0.1

.0.0.0.0.0.0.0.0.0.0.0.0.0

.1.0.0.0.0.0.0.0.0.0.0.0.1

.1.1.1.1.0.0.0.0.0.1.1.1.1

.0.1.0.0.1.0.0.0.1.0.0.1.0

.0.1.0.0.1.0.0.0.1.0.0.1.0

.0.0.1.1.1.0.0.0.1.1.1.0.0

.0.0.0.0.1.1.0.1.1.0.0.0.0

CROSSREFS

Sequence in context: A147112 A147120 A147159 this_sequence A146583 A146458 A122573

Adjacent sequences: A146825 A146826 A146827 this_sequence A146829 A146830 A146831

KEYWORD

nonn

AUTHOR

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

EXTENSIONS

Repaired example. - Ron Hardin (rhhardin(AT)att.net), Nov 05 2008

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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