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Search: id:A027278
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| A027278 |
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a(n) = Sum{T(n,k)*T(n,k+1)}, 0<=k<=2n-1, T given by A026568. |
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| 2, 8, 60, 312, 2030, 11752, 74174, 450292, 2829898, 17572000, 110733420, 695885000, 4403631638, 27874477216, 177101756296
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