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Search: id:A146466
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A146466 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-0111-0100 pattern in any orientation. +0
1
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 7, 7, 21, 21, 55, 55, 263, 263, 1645, 1645, 13423, 13423 (list; graph; listen)
OFFSET

1,13

EXAMPLE

Maximal 13 X 13 example

.0.0.1.1.0.0.0.0.0.1.1.0.0

.0.0.0.1.1.1.0.1.1.1.0.0.0

.1.0.0.1.0.0.0.0.0.1.0.0.1

.1.1.1.0.0.0.0.0.0.0.1.1.1

.0.1.0.0.0.0.0.0.0.0.0.1.0

.0.1.0.0.0.0.0.0.0.0.0.1.0

.0.0.0.0.0.0.0.0.0.0.0.0.0

.0.1.0.0.0.0.0.0.0.0.0.1.0

.0.1.0.0.0.0.0.0.0.0.0.1.0

.1.1.1.0.0.0.0.0.0.0.1.1.1

.1.0.0.1.0.0.0.0.0.1.0.0.1

.0.0.0.1.1.1.0.1.1.1.0.0.0

.0.0.1.1.0.0.0.0.0.1.1.0.0

CROSSREFS

Sequence in context: A146711 A146402 A146410 this_sequence A146141 A062368 A059772

Adjacent sequences: A146463 A146464 A146465 this_sequence A146467 A146468 A146469

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net)

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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