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A146938
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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 1111-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 2, 1, 4, 1, 6, 3, 13, 7, 38, 14, 126, 39, 447, 110, 1805, 377, 8300, 1728, 44775, 8445, 290627, 46261, 2170182
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