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A001778 as a simple table

n a(n)
6 1
7 42
8 1176
9 28224
10 635040
11 13970880
12 307359360
13 6849722880
14 155831195520
15 3636061228800
16 87265469491200
17 2157837063782400
18 55024845126451200
19 1447576694865100800
20 39291367432052736000
21 1100158288097476608000
22 31767070568814637056000 

[1,42,1176,28224,635040,13970880,307359360,
 6849722880,155831195520,3636061228800,
 87265469491200,2157837063782400,55024845126451200,
 1447576694865100800,39291367432052736000,
 1100158288097476608000,31767070568814637056000]

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Last modified June 6 18:40 EDT 2024. Contains 373134 sequences. (Running on oeis4.)