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A147047
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0100-1100-0111-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 5, 5, 9, 25, 73, 125, 433, 1109, 4789, 15605, 79281, 298381, 1737861, 8105277, 59580321, 339696501, 2994804821, 20458651317, 215020666113, 1796632825373, 23034291528869, 233369066240557, 3603324644623713
(list; graph; refs; listen; history; internal format)
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