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A039683 Double Pochhammer triangle: expansion of x(x+2)(x+4)..(x+2n-2). +0
12
1, -2, 1, 8, -6, 1, -48, 44, -12, 1, 384, -400, 140, -20, 1, -3840, 4384, -1800, 340, -30, 1, 46080, -56448, 25984, -5880, 700, -42, 1, -645120, 836352, -420224, 108304, -15680, 1288, -56, 1, 10321920, -14026752, 7559936, -2153088, 359184, -36288, 2184, -72, 1 (list; table; graph; listen)
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Last modified December 19 21:04 EST 2009. Contains 171054 sequences.


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