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Search: id:A146068
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| A146068 |
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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 5-point zee 1,1 2,1 2,2 2,3 3,3 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, 19, 19, 69, 69, 389, 389, 2287, 2287, 15081, 15081, 141721, 141721, 1694175, 1694175, 23795099, 23795099
(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
.0.0.1.0.0.0.0.0.1.0.0
.0.0.1.1.1.0.1.1.1.0.0
.1.1.0.0.1.0.1.0.0.1.1
.0.1.0.0.0.0.0.0.0.1.0
.0.1.1.0.0.0.0.0.1.1.0
.0.0.0.0.0.0.0.0.0.0.0
.0.1.1.0.0.0.0.0.1.1.0
.0.1.0.0.0.0.0.0.0.1.0
.1.1.0.0.1.0.1.0.0.1.1
.0.0.1.1.1.0.1.1.1.0.0
.0.0.1.0.0.0.0.0.1.0.0
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CROSSREFS
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Sequence in context: A146903 A146607 A147072 this_sequence A146911 A146250 A146695
Adjacent sequences: A146065 A146066 A146067 this_sequence A146069 A146070 A146071
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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), Oct 26 2008
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