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A002820 as a simple table

n a(n)
1 0
2 2
3 48
4 5824
5 2887680
6 5821595648
7 47317927329792
8 1544457148312846336
9 202039706313624586813440
10 105823549214125066767168438272
11 221819704567105547916502447159246848

[0,2,48,5824,2887680,5821595648,47317927329792,
 1544457148312846336,202039706313624586813440,
 105823549214125066767168438272,
 221819704567105547916502447159246848]

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Last modified August 10 19:52 EDT 2020. Contains 336381 sequences. (Running on oeis4.)