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A010053 as a simple table

n a(n)
0 1
1 12
2 2560
3 2903040
4 10701766656
5 98099527680000
6 1888892391260160000
7 68028459471234662400000
8 4210629057689788455321600000
9 419914246162041071241548267520000

[1,12,2560,2903040,10701766656,98099527680000,
 1888892391260160000,68028459471234662400000,
 4210629057689788455321600000,
 419914246162041071241548267520000]

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Last modified July 28 21:32 EDT 2014. Contains 245007 sequences.