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A046989 as a simple table

n a(n)
0 1
1 6
2 180
3 2835
4 37800
5 467775
6 3831077250
7 127702575
8 2605132530000
9 350813659321125
10 15313294652906250
11 147926426347074375
12 2423034863565078262500
13 144228265688397515625
14 3952575621190533915703125
15 84913182070036240111050234375
16 999843529136357459316262500000

[1,6,180,2835,37800,467775,3831077250,127702575,
 2605132530000,350813659321125,15313294652906250,
 147926426347074375,2423034863565078262500,
 144228265688397515625,3952575621190533915703125,
 84913182070036240111050234375,
 999843529136357459316262500000]

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Last modified September 18 20:18 EDT 2019. Contains 327181 sequences. (Running on oeis4.)