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A146600
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1000-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 5, 19, 39, 83, 233, 711, 2313, 8511, 40097, 191977, 1081845, 6288993, 41547129, 292524045, 2387601825, 20697818111
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