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A027046
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Sum{T(n,k)*T(n,n+k)}, 0<=k<=n, T given by A027023.
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1
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1, 2, 5, 16, 65, 286, 1305, 6232, 30377, 150178, 750937, 3785904, 19215865, 98086646, 503087741, 2591128000, 13394476993, 69466312210, 361315132065, 1884242109256, 9849626540337, 51599350440694, 270851460356973
(list; graph; refs; listen; history; internal format)
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