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A103212
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(1/n) * Sum[i=0..n-1, C(n,i)*C(n,i-1)*(n-1)^i*n^(n-i) ], a(0)=1.
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1
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1, 6, 93, 2380, 85405, 3956106, 224939113, 15175702200, 1185580310121, 105302043709390, 10482085765658661, 1156062800841590148, 139945327558704629221, 18449221488652046992914
(list; graph; refs; listen; history; internal format)
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