A100472 - OEIS

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A100472 as a simple table

n	a(n)
0	1
1	8
2	80
3	640
4	6560
5	52480
6	524800
7	4198400
8	43046720
9	344373760
10	3443737600
11	27549900800
12	282386483200
13	2259091865600
14	22590918656000
15	180727349248000
16	1853020188851840
17	14824161510814720
18	148241615108147200

[1,8,80,640,6560,52480,524800,4198400,43046720, 344373760,3443737600,27549900800,282386483200, 2259091865600,22590918656000,180727349248000, 1853020188851840,14824161510814720, 148241615108147200]