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A146178
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-100-111 pattern in any orientation.
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0
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1, 1, 1, 1, 5, 29, 161, 905, 3749, 24539, 286931, 3046339, 51706885, 1159037433, 32728917231, 966827028811
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