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Search: id:A146066
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| A146066 |
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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation. |
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| 1, 1, 1, 1, 3, 9, 19, 69, 389, 2287, 15081, 141721, 1694175, 23795099, 418616469, 9434924199, 264113682081, 9153093458787, 397472720900369, 21616544571284115, 1466493314737915869, 124160358455186794957
(list; graph; listen)
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