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Search: id:A141445
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| A141445 |
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Number of n X n integer matrices, symmetric under 180 degree rotation, with adjacent elements differing by no more than 1, counting matrices differing by a constant only once. |
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1
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| 1, 3, 45, 597, 42787, 2695803, 923529659, 278451121903, 457744547778601, 663065487350675885
(list; graph; listen)
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