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A003235
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Sum (-1)(n-k) C(n,k).C(k^2,n), k = 0 . . n.
(Formerly M4280)
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0
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1, 1, 6, 72, 1322, 32550, 1003632, 37162384, 1605962556, 79330914540, 4409098539560, 272297452742304, 18499002436677336, 1371050716542451672
(list; graph; refs; listen; history; internal format)
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