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A146040
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 2X4 tee 1,1 1,2 1,3 2,3 1,4 in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 29, 29, 249, 249, 4021, 4021, 99935, 99935, 4398251, 4398251, 362789159, 362789159, 47338031953, 47338031953, 10727733486159, 10727733486159
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