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Search: id:A146575
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| A146575 |
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Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0100-0100-1111 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 9, 9, 27, 27, 93, 93, 387, 387, 2257, 2257, 17737, 17737
(list; graph; listen)
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OFFSET
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1,11
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EXAMPLE
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Maximal 11 X 11 example
.0.0.0.0.1.0.1.0.0.0.0
.0.0.1.1.1.0.1.1.1.0.0
.0.1.0.0.1.0.1.0.0.1.0
.0.1.0.0.1.0.1.0.0.1.0
.1.1.1.1.0.0.0.1.1.1.1
.0.0.0.0.0.0.0.0.0.0.0
.1.1.1.1.0.0.0.1.1.1.1
.0.1.0.0.1.0.1.0.0.1.0
.0.1.0.0.1.0.1.0.0.1.0
.0.0.1.1.1.0.1.1.1.0.0
.0.0.0.0.1.0.1.0.0.0.0
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CROSSREFS
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Sequence in context: A162436 A146788 A147244 this_sequence A100066 A117783 A121445
Adjacent sequences: A146572 A146573 A146574 this_sequence A146576 A146577 A146578
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhhardin(AT)att.net), Nov 04 2008
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