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Search: id:A145845
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| A145845 |
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Number of permutations of length 2n+1 which are invariant under the reverse-complement map and have no decreasing subsequences of length 5. |
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1
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| 1, 2, 7, 34, 208, 1504, 12283, 109778, 1050820, 10614856, 111978128
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