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A152663 as a simple table

n a(n)
1 1
2 1
3 6
4 16
5 120
6 540
7 5040
8 32256
9 362880
10 3024000
11 39916800
12 410572800
13 6227020800
14 76281004800
15 1307674368000
16 18598035456000
17 355687428096000
18 5762136335155200
19 121645100408832000
20 2211729098342400000

[1,1,6,16,120,540,5040,32256,362880,3024000,
 39916800,410572800,6227020800,76281004800,
 1307674368000,18598035456000,355687428096000,
 5762136335155200,121645100408832000,
 2211729098342400000]

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Last modified January 22 13:41 EST 2020. Contains 331149 sequences. (Running on oeis4.)