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A049218 Triangle T(n,k) of arctangent numbers: expansion of arctan(x)^n/n!. +0
6
1, 0, 1, -2, 0, 1, 0, -8, 0, 1, 24, 0, -20, 0, 1, 0, 184, 0, -40, 0, 1, -720, 0, 784, 0, -70, 0, 1, 0, -8448, 0, 2464, 0, -112, 0, 1, 40320, 0, -52352, 0, 6384, 0, -168, 0, 1, 0, 648576, 0, -229760, 0, 14448, 0, -240, 0, 1, -3628800, 0, 5360256, 0, -804320, 0, 29568, 0, -330, 0, 1 (list; table; graph; listen)
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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