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A018931 as a simple table

n a(n)
3 0
4 1
5 2
6 12
7 72
8 480
9 3600
10 30240
11 282240
12 2903040
13 32659200
14 399168000
15 5269017600
16 74724249600
17 1133317785600
18 18307441152000
19 313841848320000
20 5690998849536000
21 108840352997376000
22 2189611807358976000
23 46225138155356160000
24 1021818843434188800000

[0,1,2,12,72,480,3600,30240,282240,2903040,
 32659200,399168000,5269017600,74724249600,
 1133317785600,18307441152000,313841848320000,
 5690998849536000,108840352997376000,
 2189611807358976000,46225138155356160000,
 1021818843434188800000]

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Last modified April 23 14:49 EDT 2024. Contains 371914 sequences. (Running on oeis4.)