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A046792
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Triangle of numbers where k-th row contains (ij)!/(i!j!) with i+j=k+1, 1<=i<=k.
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0
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1, 1, 1, 1, 6, 1, 1, 60, 60, 1, 1, 840, 10080, 840, 1, 1, 15120, 3326400, 3326400, 15120, 1, 1, 332640, 1816214400, 36324288000, 1816214400, 332640, 1, 1, 8648640, 1482030950400, 844757641728000, 844757641728000, 1482030950400, 8648640, 1
(list; table; graph; refs; listen; history; internal format)
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