A111782 - OEIS

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A111782 as a simple table

n	a(n)
8	1
9	72
10	3285
11	122760
12	4138695
13	132046200
14	4096887795
15	125691766200
16	3854667766950
17	119027264756400
18	3719190784859550
19	118004440103550000
20	3811105656937829250
21	125500234402721178000
22	4218813452749267622250

[1,72,3285,122760,4138695,132046200,4096887795, 125691766200,3854667766950,119027264756400, 3719190784859550,118004440103550000, 3811105656937829250,125500234402721178000, 4218813452749267622250]