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A002301 as a simple table

n a(n)
3 2
4 8
5 40
6 240
7 1680
8 13440
9 120960
10 1209600
11 13305600
12 159667200
13 2075673600
14 29059430400
15 435891456000
16 6974263296000
17 118562476032000
18 2134124568576000
19 40548366802944000
20 810967336058880000
21 17030314057236480000
22 374666909259202560000

[2,8,40,240,1680,13440,120960,1209600,13305600,
 159667200,2075673600,29059430400,435891456000,
 6974263296000,118562476032000,2134124568576000,
 40548366802944000,810967336058880000,
 17030314057236480000,374666909259202560000]

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Last modified September 16 08:23 EDT 2019. Contains 327091 sequences. (Running on oeis4.)