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A218652 as a simple table

n a(n)
1 1
2 2
3 12
4 108
5 1320
6 20400
7 381360
8 8366400
9 210712320
10 5991572160
11 189846961920
12 6632804344320
13 253310120743680
14 10498203901785600
15 469251125818675200
16 22501933753870771200
17 1152276591132072806400
18 62756742945031098163200
19 3622251744055050294988800

[1,2,12,108,1320,20400,381360,8366400,210712320,
 5991572160,189846961920,6632804344320,
 253310120743680,10498203901785600,
 469251125818675200,22501933753870771200,
 1152276591132072806400,62756742945031098163200,
 3622251744055050294988800]

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Last modified March 23 16:52 EDT 2019. Contains 321432 sequences. (Running on oeis4.)