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A109742 d(n-1) + d(n-2) + (n-1)[d(n-2) + 2d(n-3) + d(n-4)], where d(n), the derangement numbers, are given in A000166.. +0
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1, 2, 5, 9, 27, 123, 693, 4653, 36111, 317583, 3118617, 33804177, 400755267, 5156954019, 71572594557, 1065571143093, 16938122939703, 286298719063863, 5127206924693601, 96975312507734553, 1931609062232400747, 40414621201681598667, 886153986344092389957 (list; graph; listen)
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Last modified December 20 16:13 EST 2009. Contains 171081 sequences.


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