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Search: id:A147479
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| A147479 |
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-1111-1100 pattern in any orientation. |
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1
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| 1, 1, 1, 1, 1, 1, 1, 9, 20, 33, 56, 123, 372, 1117, 3761, 13503
(list; graph; listen)
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