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Search: id:A146876
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A146876 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1110-0100-0111 pattern in any orientation. +0
1
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 17, 17, 37, 37, 81, 81, 581, 581 (list; graph; listen)
OFFSET

1,13

EXAMPLE

Maximal 13 X 13 example

.0.0.0.1.0.0.0.0.0.1.0.0.0

.0.0.0.1.1.1.0.1.1.1.0.0.0

.0.0.0.1.0.1.0.1.0.1.0.0.0

.1.1.1.0.0.1.0.1.0.0.1.1.1

.0.1.0.0.0.0.0.0.0.0.0.1.0

.0.1.1.1.0.0.0.0.0.1.1.1.0

.0.0.0.0.0.0.0.0.0.0.0.0.0

.0.1.1.1.0.0.0.0.0.1.1.1.0

.0.1.0.0.0.0.0.0.0.0.0.1.0

.1.1.1.0.0.1.0.1.0.0.1.1.1

.0.0.0.1.0.1.0.1.0.1.0.0.0

.0.0.0.1.1.1.0.1.1.1.0.0.0

.0.0.0.1.0.0.0.0.0.1.0.0.0

CROSSREFS

Sequence in context: A079317 A125256 A075684 this_sequence A147206 A146852 A146237

Adjacent sequences: A146873 A146874 A146875 this_sequence A146877 A146878 A146879

KEYWORD

nonn

AUTHOR

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

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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.


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