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A002820 as a simple table

na(n)
10
22
348
45824
52887680
65821595648
747317927329792
81544457148312846336
9202039706313624586813440
10105823549214125066767168438272
11221819704567105547916502447159246848

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