A052820 - OEIS

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A052820 as a simple table

n	a(n)
0	1
1	2
2	9
3	62
4	572
5	6604
6	91526
7	1480044
8	27353448
9	568731648
10	13138994112
11	333895239072
12	9256507508112
13	278000959058016
14	8991458660924112
15	311585506208924064
16	11517363473843526912
17	452332548042633835776

[1,2,9,62,572,6604,91526,1480044,27353448, 568731648,13138994112,333895239072,9256507508112, 278000959058016,8991458660924112, 311585506208924064,11517363473843526912, 452332548042633835776]