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A001777 as a simple table

n a(n)
5 1
6 30
7 630
8 11760
9 211680
10 3810240
11 69854400
12 1317254400
13 25686460800
14 519437318400
15 10908183686400
16 237996734976000
17 5394592659456000
18 126980411830272000
19 3101950060425216000
20 78582734864105472000
21 2062796790182768640000
22 56059536297908183040000

[1,30,630,11760,211680,3810240,69854400,
 1317254400,25686460800,519437318400,
 10908183686400,237996734976000,5394592659456000,
 126980411830272000,3101950060425216000,
 78582734864105472000,2062796790182768640000,
 56059536297908183040000]

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Last modified April 24 03:00 EDT 2024. Contains 371917 sequences. (Running on oeis4.)