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A027233
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Sum{T(n,k)*T(n,k+2), 0<=k<=n-2, T given by A026758.
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0
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1, 7, 34, 184, 785, 4107, 16894, 88397, 358212, 1892182, 7609892, 40695540, 162938176, 882569071, 3523144085, 19320028921, 76956041950, 426863069443
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