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A147342
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0100-0100-1111-0010-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 7, 13, 21, 31, 71
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,10
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EXAMPLE
| Maximal 10 X 10 example
.0.0.0.0.0.1.0.0.0.0
.0.0.0.0.0.1.1.1.0.0
.0.0.0.1.1.1.0.0.1.0
.0.0.1.0.0.1.0.0.1.0
.0.0.1.0.0.0.1.1.1.1
.1.1.1.1.0.0.0.1.0.0
.0.1.0.0.1.0.0.1.0.0
.0.1.0.0.1.1.1.0.0.0
.0.0.1.1.1.0.0.0.0.0
.0.0.0.0.1.0.0.0.0.0
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CROSSREFS
| Sequence in context: A098577 A004136 A147409 * A172310 A060939 A174030
Adjacent sequences: A147339 A147340 A147341 * A147343 A147344 A147345
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KEYWORD
| nonn
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net)
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