A167558 - OEIS

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A167558 as a simple table

n	a(n)
2	1
3	12
4	160
5	2688
6	55296
7	1351680
8	38338560
9	1238630400
10	44920995840
11	1807409479680
12	79906524364800
13	3850733459865600
14	200907832688640000
15	11282983883794022400
16	678650586195610828800
17	43527244493925384192000

[1,12,160,2688,55296,1351680,38338560,1238630400, 44920995840,1807409479680,79906524364800, 3850733459865600,200907832688640000, 11282983883794022400,678650586195610828800, 43527244493925384192000]