A012795 - OEIS

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A012795 as a simple table

n	a(n)
0	1
1	6
2	120
3	6216
4	652800
5	115944576
6	31101732480
7	11717149191936
8	5895158281052160
9	3816842537847607296
10	3090738173477544099840
11	3060041827367678200774656
12	3636490261219371329053163520

[1,6,120,6216,652800,115944576,31101732480, 11717149191936,5895158281052160, 3816842537847607296,3090738173477544099840, 3060041827367678200774656, 3636490261219371329053163520]