A165173 - OEIS

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A165173 as a simple table

n	a(n)
0	1
1	41
2	1640
3	65600
4	2624000
5	104960000
6	4198400000
7	167936000000
8	6717439999180
9	268697599934400
10	10747903996064820
11	429916159790145600
12	17196646389507936000
13	687865855496401920000
14	27514634216499456000000

[1,41,1640,65600,2624000,104960000,4198400000, 167936000000,6717439999180,268697599934400, 10747903996064820,429916159790145600, 17196646389507936000,687865855496401920000, 27514634216499456000000]