A208661 - OEIS

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A208661 as a simple table

n	a(n)
1	1
2	4
3	16
4	144
5	3072
6	160000
7	20736000
8	6776582400
9	5639493386240
10	12041750911647744
11	66367674777600000000
12	948747002032456704000000
13	35319813420678024297185280000
14	3435829941215659552226769213849600

[1,4,16,144,3072,160000,20736000,6776582400, 5639493386240,12041750911647744, 66367674777600000000,948747002032456704000000, 35319813420678024297185280000, 3435829941215659552226769213849600]