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A146779
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0010-1010-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 3, 5, 15, 25, 43, 101, 369, 1113, 5539, 16529, 75239, 298319, 1804759, 9458781, 72980139
(list; graph; refs; listen; history; internal format)
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