A052586 - OEIS

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A052586 as a simple table

n	a(n)
0	1
1	1
2	2
3	6
4	48
5	360
6	2880
7	30240
8	362880
9	4717440
10	68947200
11	1117670400
12	19639065600
13	373621248000
14	7671689625600
15	168689993472000
16	3954407288832000
17	98525417582592000
18	2599363724525568000

[1,1,2,6,48,360,2880,30240,362880,4717440, 68947200,1117670400,19639065600,373621248000, 7671689625600,168689993472000,3954407288832000, 98525417582592000,2599363724525568000]