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A027241
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a(n) = Sum{T(n,k)*T(n,k+2), 0<=k<=n-2, T given by A026769.
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0
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1, 7, 38, 201, 991, 5119, 25108, 131207, 652171, 3467959, 17536482, 94772169, 487259131, 2668269045, 13920305080, 77008669339, 406737748473
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