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A146623
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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 1001-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 3, 1, 5, 1, 7, 5, 21, 13, 69, 33, 309, 131, 1529, 465, 8153, 2505, 52849, 18109, 418127, 137539, 4312045, 1253575, 52848473
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