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Search: id:A027309
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| A027309 |
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a(n) = Sum{(T(n,k)*T(n,k+1)}, 0<=k<=2n-1, T given by A026323. |
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| 2, 16, 123, 956, 7519, 59742, 478869, 3868104, 31458348, 257396972, 2117494621, 17504651148, 145341743066
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