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A147197
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-0100-0111-0001 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 5, 5, 9, 17, 69, 103, 261, 509, 2919, 6029, 27429, 73047, 523687, 1587321, 10285447, 37481773, 334798483, 1395159927, 13476048417, 66683704581, 829426776361
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OFFSET
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1,6
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.1.0.0.0
.0.0.1.1.1.0.0.0
.0.0.1.0.0.1.1.0
.0.1.1.0.0.1.0.0
.0.0.0.1.1.1.0.0
.0.0.0.1.0.0.0.0
.0.0.0.0.0.0.0.0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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