A002820 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

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]