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Search: id:A147433
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A147433 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1010-1111-0101 pattern in any orientation. +0
1
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 9, 9, 19, 19, 43, 43, 151, 151, 665, 665, 3477, 3477 (list; graph; listen)
OFFSET

1,13

EXAMPLE

Maximal 13 X 13 example

.0.0.1.0.1.0.0.0.1.0.1.0.0

.0.0.1.1.1.1.0.1.1.1.1.0.0

.1.1.0.1.0.1.0.1.0.1.0.1.1

.0.1.1.0.0.0.0.0.0.0.1.1.0

.1.1.0.0.0.0.0.0.0.0.0.1.1

.0.1.1.0.0.0.0.0.0.0.1.1.0

.0.0.0.0.0.0.0.0.0.0.0.0.0

.0.1.1.0.0.0.0.0.0.0.1.1.0

.1.1.0.0.0.0.0.0.0.0.0.1.1

.0.1.1.0.0.0.0.0.0.0.1.1.0

.1.1.0.1.0.1.0.1.0.1.0.1.1

.0.0.1.1.1.1.0.1.1.1.1.0.0

.0.0.1.0.1.0.0.0.1.0.1.0.0

CROSSREFS

Sequence in context: A086739 A147502 A147343 this_sequence A146903 A146607 A147072

Adjacent sequences: A147430 A147431 A147432 this_sequence A147434 A147435 A147436

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net)

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


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